Definitely a cool OC in Seth. I love your story it has great potential.

AHH... What did Rachet Look like?(
Also, you you're - not Your.

I definitely enjoyed Ratchet's reaction to him being covered in paint-Arcee, Bulkhead, Bee, and Optimus was a bonus...!

*On a more subdued note, it looks like Seth has a long ways to go before he recovers mentally. Plus there's the fact that we get to see a little of who Optimus had feelings for.*

As far as the cons go, the bots can find slight relief that there are those on the 'bad guys side' with a sense of honer. *Not like that Female Spider con. She seems to have a sick sense of pleasure of hunting down her prey...like a poacher.* (At least as far as the show goes...)

Poor Bulkhead...! Now he has to deal with Miko on a sugar rush until the 'sugar crash' sets in-then she'll be out cold for a while. (*I think that might be a reason in itself not to get a pet like a dog or cat.*) From what I've seen, she's a handful when she ISN'T on a sugar rush.

(It looks like Seth's body is still trying to adjust to the energon that now circulates his system...) I think he might be ok once his body gets used to it...

But since energon is an alien substance, we have yet to see how it effects him in the long run.

But considering dark energon is the polar opposite of energon, it does have me a little worried about that one arc where the Destroyer tries to fully awaken...if you don't mind me saying so.

I love it! Please continue more xD

Please continue!This is great!

Uh... There seem to be a LOT of typos... Is there a particular reason why?
For example, some times proper names are not capitalized...

Sounds like Ratchet is about to be given quite the emotional ride in the future...

The story is very good English is not my first language I hope it will get continue

This is very good. A great read so far. Though there are a few spelling errors and grammar mistakes. Might one suggest a beta reader? Otherwise keep up the awesome work.

Looks like it'll take a while for Seth to trust the bots and the kids.

Seth was either crazy or stupid to bite Optimis and Ratchet like that.

Now that the kids are on the scene, I'm interested in seeing when Miko can have her fun with him.

Now that Ratchet and the other bots Know a tiny bit about Seth, he's that much closer to being healed in an emotional sense-or a spiritual one...which ever needs healing more.

(Looks like Ratchet refuses to admit that he's somewhat broken from watching so many lives being lost back on Cybertron. He's probably upset about the death of Cliffjumper *although Arcee might even more so*...not to mention about that fiasco with Bee's voice box.) Since Seth is on the scene, there's a small possibility that Ratchet might be able to have some healing of his own...granted things go smoothly.

Some misspelled words but this is good :)
I really love the interactions of Seth towards the Autobots~
He is like a chibi Megatron but more human :D
Update as soon as you can :D

So now that Seth and Ratchet are now paired with each other, I'm real interested in seeing what happens from here on out.

(Especially since Miko and the others haven't heard of Seth's past...which I'm not sure when that'll come out into the open.)

You have a few misspelling here and there, but otherwise, I quite enjoyed it and will wait until the next chapter is up.