That would have to be Mackenzie....
All of my child ocs Are (avengers) Mackenzie, original Solaria, (Skyfallen) solar, and (Skyfallen) Max.

Mackenzie can't be killed by everyday things. She is also made is a silver substance and has a light speed surfboard. She has the power of energy and can appear human but her true skin color is silver. She's also emotionless and I'd only 8. She has no family, since her dad, the silver surfer, is missing. Imagine fighting her... Tell me that's not scary