You and Ash have known each other since birth! You guys were born in the same hospital to different parents who knew each other, as such, you got to grow up around her and learn about her more.

Suddenly, one day, first day of high school she...stopped speaking, no words, not explanation, no sign language she just...stopped, she carried around a notepad and tried playing it off like nothing happened.

More years pass and while the silence was something to get used to, it didn't stop you from developing feelings for her eventually, luckily they were mutual and you two were now dating! At this point she'd also officially registered to be a hero and you noticed how rather...bloody her fights got, but she was fine! That's all that mattered. Soon enough after she became a hero you got married. Seeing as she's a hero, she's got powers, they are the following

Burning blood: her blood now burns with the heat of a fire, anything her blood touches will burn so long as it's flammable, additionally, if she concentrates enough the blood will heal allies but the burning sensation will be worse. The burning sensation is felt inside her at all times but she's gotten used to it.

Hemokenesis: she has the ability to control her blood externally and internally, she can harden and and use it as projectiles of keep it semi solid and use it as a whip

Perfect strike: a strike that never misses it's target, it gets stronger the more attacks she's thrown at a target

Demon form: in exchange for losing access to previous abilities gain immeasurable strength, once on, she must kill something living for it to go off

Physical description:

She's 6'4 with grey hair and greyish tan skin, her armor is a dull yellow and only covers her left should and elbow along with her knees and her torso/breasts. Her right arm is bandaged up and is perpetually bleeding

[Yeaaahhhh...she's based on Ironclad from sts2, seriously, go play it]