Possession

Little did Tsuna know, that today was one of those days that was going to change his life forever. Not like most have already in the past year or so, but today was just one of them. One of the few that would possibly strengthen the family. If it went along all right.

Little did he know, just how much he could affect someone.

It all started one day when Tsuna was at home doing his homework, just minding his own business while Reborn was downstairs with Nana and the kids.

"Saluti, Tsunayoshi-sama!"

"Eh?" Tsuna raised his eyes to his window. Casana was perched on the sill, grinning at him. Her hair was in a ponytail. "Casana-san!"

"Ne hee hee hee," Casana came into the room, fixing her weapon on her back. "I didn't come at a bad time, did I?"

"N-no! Not at all!" Tsuna turned around in his chair. "W-why are you here?"

"Well Tsunayoshi-sama," Casana pulled out the hair tie and released the ponytail. "I had gone to the Kokuyo Base and...discussed some things with Mukuro and Nagi."

"Eh?! Why!?" Tsuna gasped. "They didn't try to kill you!?"

"No no. Mukuro actually asked me to come there." The brunnette explained. "Because Nagi requested it since she wanted a little bit of female company for a change. I don't refuse her, ever. So I went, and while there we discussed a few things."

"What did you discuss?" Tsuna asked, curious.

"It was mostly about you." Casana said, a bit blankly.

The smaller brunet recoiled in shock. "Eh?! What do you mean!?"

"Mukuro talks a lot about you, I've noticed. He asked me how you were doing, what you've been up to, if you've been keeping up with your training and whatnot. I was puzzled, wondering why he was asking me all that, so I asked him why, and he just chuckled, telling me that he was simply curious...noting that you've grown since you fought him that day." Casana sat on his bed, looking at the younger teen. "He does have a level of respect for you, Tsunayoshi-sama."

"B-because I...defeated him?" Tsuna questioned.

"Yes. He's surprised one with such kindness could surpass someone like him, and despite a lot of things, he respects you for that. I'm sure you already knew that, though."

"W-well...I did have an idea." Tsuna shrugged, looking down at his feet.

"Also..."

"Mm?"

"Mukuro talks very much about possessing you, he's carefully planning his moves, getting closer to you, earning your trust and then taking over you when you've dropped your guard enough to leave an opening. ...Tsunayoshi-sama, you have to be careful of this." Casana faced him again, looking concerned. "He will do anything to possess you...and he apparently can't give up. You have to do something."

"W-what can I do? He's come back...after I first fought him, and now that he's out of that Vendicare place...won't he come back again?" Tsuna looked at her.

"That's not what I'm saying." Casana shooked her head, pushing back a strand of her hair. "Tsunayoshi-sama...he's your Mist Guardian, and he's quite crucial to the Family, given his abilities. I think it's time he stepped in and became your ally once and for all. Think about it...despite everything he's done, things he's planning to do, all of that, overlook it for a moment. What if he were to become one of you guys? Like a...friend?"

"A...friend?" Tsuna seemed surprised at the use of the word. "Mukuro...a friend?"

"Yes, I know that it's highly unlikely given how he is, but think of it."

"Ah..." Tsuna nodded, letting the information sink in as he pondered the idea.

I-I know Mukuro has done a lot to others, and to me, and that makes us all hate him. But, if he were...I don't know, normal, not having been growing up like he had, we maybe could've been friends. Even now...if we became friends, all of my Guardians getting along, save for Hibari-san, but...if we could do that...that'd be really..really...

"I'd definitely want Mukuro as a friend!" Tsuna bursted. "I know it's impossible, and I can never forget what he's done to me...but," He softened. "I believe in the power of forgiveness. After all he's been through...he doesn't deserve it, it doesn't matter what he did. It wasn't entirely his fault...there was more to it than that..."

"Tsunayoshi-sama..." Casana gasped lightly, and smiled. "You and I really aren't so different at all, are we?"

"Ah...well, I guess not." Tsuna smiled back.

Casana giggled a bit, but then her expression changed and she let out a pained groan, clutching her head. "Aaagghh!! Gaaah!!"

"Casana-san!!" Tsuna jumped up, hurrying over to her. "What's wrong?! Are you all right!?"

"Kufufu...still worrisome as ever, Tsunayoshi-kun..."

"Eh?!" Tsuna recoiled from her as though she were on fire. ITh-that's her voice...but not her words...th-this feeling...is it...?/I

"Kufufu..." Casana looked up at him, smirking. Tsuna was shocked to discover that her right eye was red.

"M-Mukuro?!" Tsuna gasped, falling back into his chair.

"Oya? Surprised to see me, Tsunayoshi-kun?" Mukuro said pleasantly through Casana, smirking at him lightly.

"W-what are you doing controlling her mind?!" Tsuna cried, pointing a finger at him...her?

"Kufufu...who said anything about controlling her mind? I'm simply possessing her body. Mm, she's a lovely girl, don't you agree?" Mukuro smiled.

"Don't change the subject!!" Tsuna yelled. "What are trying to do!? She's not involved in any of this!!"

"My my Tsunayoshi-kun, you haven't changed a bit." Mukuro shook his head, or Casana's head rather. "Protecting others above protecting yourself. How amusing. But I suppose I should get right to the point, all this idle chatter is getting us nowhere. You didn't noticed this scratch over here, did you?"

"Eh? Scratch?" Tsuna looked puzzled. "What scratch?"

Mukuro chuckled and pointed at her neck, there was a small scrape curving around to the front from the side. "I managed to puncture her with my trident...in order to possess her properly. Remember? You heard from that Arcobaleno infant."

"You mean you...while she was there...you..." Tsuna began, realizing. IWhy didn't she tell me?!/I

"Kufufu...I didn't expect her to have told you. Quite a disappointment this girl really is...such a talented assassin, no? Instead she falls hard into that illusionary-esque world...of kindness. What a waste. You can say we're alike...although yet I prefer not to be compared to her."

"W-what are you saying?!" Tsuna cried. "She's nothing like you! Leave her alone, she has nothing to do with you!"

"Oya? You forgot she suffered, like I have. Always alone...surrounded by pain, loneliness, all the things in the world people could never dream to want. Expecting the love, warmth and nurturing you crave for, instead you get nothing more than the abuse, the hell. Killing, being on the run, to find a new hope." Mukuro shook his head. "Unlike me, she could still hold onto the wedge of kindness. How disappointing."

"...Killing?" Tsuna was surprised, not having known of this.

"But enough of that, Tsunayoshi-kun. I've decided to slowly possess you now. Especially through this." Mukuro smirked.

"Eh?! What do you mean?!" Tsuna cried in shock.

"Kufufu..." Mukuro reached down to Casana's right hiking boot, reached into a hidden compartment on the sole, and pulled out a gun. "She carries a gun with her, although she prefers not to resort to it unless necessary. Did you know that, Tsunayoshi-kun?"

"Ah..." Tsuna blinked in amazement. " N-no..."

"Didn't think so, but it can't be helped." Mukuro twirled the gun in his, or Casana's hand rather, grinning. "And did you know that it also contains a special bullet?"

"Special...bullet?"

"That's correct. The Estreneo Family developped more than just the Possession Bullet, Tsunayoshi-kun. They also developed a bullet that has the power to re-appear inside of the gun after being shot out. What a clever girl she was, don't you think? Preferably not into using a gun...and yet doesn't want to be out of bullets in case of needing one. Kufufu...the same gun she shot her own father with..."

"Ehh!?" Tsuna's eyes widened in shock. "She...she shot her father?!"

"Oya? Did I just say that?" Mukuro said in mock confusion. "Ah, but that doesn't matter now. Tsunayoshi-kun, obey me, and come quietly, or..." He pointed the barrel at Casana's head. "Kusabana Casana, known as Speed Demon, and Giungla Fiore, will die."

"W-what?!" Tsuna yelled. "You..you can't do that! That's her body!"

"Kufufu...did you forget? It's my body now, I choose what happens to it. And don't forget, you must always be cautious of me, Sawada Tsunayoshi-kun...because I'm doing this only to be able to possess your body." Mukuro clicked the hammer. "So what's it going to be? One pull of the trigger, and she's dead."

"...Stop this!" Tsuna cried. "You're lying! You didn't just become my Guardian to possess my body! Deny it all you want, but I know you're lying!"

"Oya? You honestly think that?" Mukuro lowered the gun, looking amused. "So naiive, as always. It's so amusing. I'm not the nicest human being, I cause nothing but pain and suffering to those who cross me."

"It's not your fault! You lived a life believing that!" Tsuna shouted. "You never had a good home, good people to raise you into what a person really should be! You suffered and always faced pain from those who were supposed to raise you, love you and nurture you. You wanted to get back at everything, make everyone else feel as horrible as you did...believing that all the great things in life are illusions! You think that after one horrible incident, that everything is as it was there! But that's not true! You...no one deserved that! You never would've been like that if you weren't in that family! It's because of that, that you're where you are today. Things could've been different...we could've been...friends."

"..." That little speech caused Mukuro to be rendered speechless.

Taking a deep breath, Tsuna continued. "But you can start over...take the life you never had...and make that choice, the choice to live the life you want. You can start a new life...a life without worry of the Vendiche coming after you, or anything like that. I know the Mafia is a cruel, dangerous world, but, we're nothing like that horrible family. I-I don't want you to face all that danger...when you could be...be..."

"Be what, Tsunayoshi-kun?" A little smirk came across Casana's features as Mukuro prompted him. He was quite amused.

"...Be happy." Tsuna finished.

Mukuro was taken aback by Tsuna's words, disbelieving that someone like him could be so...so...kind, to him. Him of all people.

"And Mukuro ...I forgive you." Tsuna smiled.

"W-wha..." Mukuro blinked, completely shocked.

"I'll never forget what you've done to me, but...you're my Guardian now, and I believe in the power of forgiveness."

"...Tsunayoshi...why do you even care..." Mukuro's right eye twitched and he sat on the bed. "I deserved all that I faced, I had it coming. I was just as heinous as that family..."

"Only because you were in that family." Tsuna said softly. "You made that choice because of how you lived. You would never have done that if you lived...differently."

Mukuro was silent, looking from Tsuna to the floor a few times, sighing. Finally, he spoke out.

"Why do you care about me, Tsunayoshi? After what I did to you, I would have expected you to hate me with a passion." Mukuro demanded.

"Because you're my Guardian now." Tsuna said softly, and looked into what was now her mismatched eyes. "And I won't let you live like that ever again."

"...Tsunayoshi..." Was all Mukuro said before Casana's body then swayed lightly, falling down onto the bed. After a few moments, she sat up again, rubbing her head.

"Ah...C-Casana-san?"

"Uhn?" Casana looked up at him. "What happened, Tsunayoshi-sama? I blacked out...what happened?"

"Ah..." Tsuna began, and then shook his head. "It's nothing."

"Boss!"

"Waah!!" Tsuna looked to the door. "C-Chrome?!"

"Nagi?" Casana blinked. "What are you doing here?"

"Boss, Casana-nee-chan, I'm so sorry...I didn't make it in time!" Chrome said apologetically. "When Mukuro-sama...said what he'd do...I tried to stop him, but he said it would help...you were already gone so I tried to come after you...but you were too fast for me."

"Nagi..." Casana turned to Tsuna. "Tsunayoshi-sama, what happened while I blacked out?"

"Ah..." Tsuna looked down at his lap. "Mukuro, he...possessed your body."

"Ah, Boss, I'm sorry!" Chrome said softly. "I didn't think he would, until he said so, and..."

"Chrome-san it wasn't your fault." Tsuna assured her.

"Nagi," Casana stood, walking over to the girl. "I'll take you back now, okay? You don't have to worry."

"Casana-nee-chan..." Chrome smiled. "That's okay. You don't have to go through that trouble just for me. Boss...is it all right if I stay here with you for now? I don't want to go back now..."

"Ah..." Tsuna was surprised at her request, but nodded. "All right, you can stay."

"Oh, thank you!" Chrome smiled and kissed Tsuna on the cheek.

"Hey!!" Tsuna's entire face turned pink.

"Casana-nee-chan, can I do your hair tonight? I want to try my pineapple style." Chrome giggled.

"Ah, sure Nagi-imotou-chan..." Casana hesitated lightly. She wasn't the girly type and wasn't into all the cosmectics and hair and fashion stuff. But to humour Chrome and make her happy, she went through with it. (Imotou is a way to address your little sister.)

Tsuna laughed, they were pretty funny together.

He then began to wonder...what was Mukuro going to do now?