Hiro Complex

A Big Hero 6 Danny Phantom Crossover

By Allietheepic7

Chapter 1: Immortals

Sometimes, Daniella Fenton really hated owning a dojo.

Most of the time, she loved it. Karate was her mother's passion, and the woman had passed her love of the art down to her daughters before her death. And Danny loved teaching. The children in San Fransokyo were so polite compared to those in Amity Park. But every once in a while, some self-entitled "badass" comes in to try and prove himself. Danny can usually send them away with their egos more bruised than their skin, but this one decided to fight dirty and break her wrist.

Now they both were in the hospital.

Danny grit her teeth as the doctor set her wrist in a splint. It wasn't too bad and with her powers, it should heal in a few days. She's gotten worse from ghost fighting. Besides, she's nineteen. She can't be crying over every little broken bone. Fenton's were better than that.

She was 15 when her family was killed by her evil, jerky self. Danny had barely enough time to suck the ghost in the thermos when the boiler exploded. Her family, friends, and teacher died instantly and she made it out okay. Most of her, anyway.

Danny rubbed her robotic leg absently. The technology on the West Coast was truly amazing. The surgeon had attached her amputated nerves to her stomach muscles. Whenever she tried to move her missing leg, the control signals from her brain caused her stomach muscles to contract. The activity is sensed with electrodes in prosthetic and provides control signals to the fake limb. The end result is that just thinking about moving her leg causes it to move. Amazing. It was really expensive, but Vlad took care of that.

She isn't afraid of that future anymore. It hadn't been Vlad's fault that she became evil; it was her own. She'd wallowed in the pain and refused to talk to anyone in that alternate timeline. So this time, Danny had actively sought therapy. But it didn't work very well as it reminded her to much of Jazz.

Then Danny discovered the wonders of online education. Yes, she hadn't really cared about learning before, but now Danny was desperate for any form of distraction. She had torn into her school work in way that would make Mr. Lancer and Jazz proud.

In a year and a half, she was finished with high school and had lost her distraction. She hadn't fought a ghost in all that time and only trained in human form. Danny didn't even "go ghost" just to make sure Vlad knew she wasn't going to be his daughter.

He bought her the dojo, as some sort of bribe she thinks. The old Fruitloop even let her move there at 17, only requiring that she make weekly calls.

"Miss Fenton?" Danny looked up to find that her doctor was finished. She smiled hesitantly.

"Oh, yeah. Thank you—" Her chest constricted and a puff of ice blue air escaped her lips.

Her ghost sense. Great, Vlad decided to spy on her again, she thought. After swiftly thanking the doc, Danny escaped into the hall and tried to find the ghost.

After some trial and error, she eventually found the room. In the coma ward. Joy. Danny cautiously entered the room. On the bed was a man on life support with half of his body covered in bandages. Sitting opposite to the bed was the man's miserable ghost. He didn't lift his head from his hands at her entrance, even though he must have heard her. His spiritual body flickered once a minute.

Danny walked to the end of the bed and picked up the medical information hanging there. Her eyes glanced over the information and she peeked at the ghost. "I'm surprised you've lasted this long."

His head snapped up. "Excuse me?"

Wow. He was cute. His amber eyes were wide with shock. The ghost's big nose, neat hair, and grandpa clothes gave him a dorky look.

"I'm surprised you've lasted 2 months," Danny said slowly, looking directly at him. "Most out of body experiences result in the spirit returning to the body or moving on in a few days. I've never heard of one lasting so long."

The ghost stared at her with…hope. No one's looked at her with hope since the explosion. "You can see me," he whispered.

"Yes," Danny knelt in front of him and touched his hand, giving him his first human touch in months. "I can. My name is Danny Fenton."

He smiled, making Danny's heart skip a beat. "Tadashi. Tadashi Hamada."

Headcanons that Inspired this Story

Tadashi is not dead, because Big Hero 6 is a Marvel movie and, let's face it, Marvel has trouble with killing people.

If the Ultimate Enemy succeeded in killing Danny's parents and she had still gone to Vlad's, she would have tried to keep her distance emotionally (to some degree of success). Their relationship was far too damaged at this point for any parental bond, but she would occasionally slip and call him "Uncle Vlad."

Danny would try therapy, but with the reminder of Jazz and the memories of Spectra (plus some suspicion because Vlad was the one who hired them), it didn't work. Thus, she developed "focus vision," allowing her to block everything out while she was working.

Assuming that the SFIT fire happened early August, Hiro would have fought Callaghan in September-ish, because when Hiro discovers Yokai, Aunt Cass says that SFIT was only a few weeks into the year. This chapter takes place mid-October.