I have this idea but not at 100% with all of it... and hope to get some thoughts and all that. 

PART 1!!

NEW Idea!!

OC

Asuka Midoriya .

My OC is Izuku Midoriya twin sister, separated by a couple of days after birth. After 7th birthday got in contact with real mom, asked to not say or do anything for the time being, in fear that they may do something to her and or her brother, and to wait till later when it's safer and they are taken care of. Both 16-17 year old now, they will meet with mom and some classmates at the school yard...

(Suit)

 (normal)

 (Dark Side)

(1st)          (last)

(OC)Asuka Midoriya = Spirit-Wave

• Spirit(s) Energies ~ S rank - it allows her to see talk and influence the energies/spirits that come off people, and call others to come help and translated true feelings/translations, she can also call her "dark side" out ... it basically looks like a Demon Possession thing, but isn't, her other side is just out and kinda has a bad habit of overdoing it or snapping and some real big damage to the opponents and such like intimidation or intense pressure around. Has the ability to see potential in others and in the different ways and roots with the energy/spirits, can also adapt to others to a point and such, as well as nullify a quirk aimed at her or others(...mostly, but with major headaches later). And has the Song(spirit voice) music and songs plays at will for fights healing intense battles and special moves, she is able to do this by taping in on the energies and spirits around her and others. Can heal herself and others, reclaim limes or regenerate them with lots of energy, so food sleep relax (small) stress and meditation is very much needed. Can morph the energies to certain shapes and tools for use(

NOTE; she is a duel but prefers to be a support relief person, but will fight if necessary. (combat it all black belt master levels) and has a few weapons too

Favorite move(s):

Asuka special move = Spirit field reemergence, it's basically a flower forest spirit field like thing (top 50 mile range) it can heal(all wounds, some only temporary) or render the person(s) useless and powerless.(gloves, sutures/talisman/Japanese paper charm, leather whip)it can also restores buildings and people(if not 100%dead).

Dark side Asuka special move = Harrows Field, it's a dead dark evil looking field (top 50 mile range) and said opponent(s) get their asses handed to them on a silver platter, and or they go through their own personal hell, PDST might be a side effect. (chain whips{4-14}, deadly gloves and knuckles) nasty habit of "eating" "cursing" or "sealing" quirks(temporarily, and if certain conditions are met)

Neutral special move = field of memories,10 meter rang, the fields looks different depending on who and what, normally the memories are like trees, flowers and or crystal cave garden type, even books. Shows their memories and 'ghosts' of their past, it(the memories) can be recorded pictures too, good or bad.

Calling ghost(s) to chat and help with some things or just to hang out. Works if they are still there or remnants left behind.

Ghosting is like camouflage, and it erases your presence.

Rage Pulse, is basically an intense presser to render a person(s) useless and motionless, at times making them fall to the ground paralyzed. Can be charged up and used with combos...

Re-build, uses the energies and spirits to rebuild broken things...

Others:

Healing hand/kiss/touch/wave

Nullify. Hands on quirks or stealing/copy quirks.(she can kinda doesn't like that copy and stealing, and uses her energies to stop that)

Sleep. Can calm the raging quirks.

Recover. Heals old wounds for the most part...

Transporter. Can touch others to give them a spirit image to help teach them other stuff and mussel memory.

Can use her skills with animals, plants(certain extents), insects, extra...

personality: kinda shy in the beginning, but she will end those who hurt her family and people, fan girls easy, up-beat with or when she is more confident. Quite and can be very ninja like...

love(interest) / sexuality: Bi ... Asuka Midoriya x Koji Koda...(probably not)

likes and/ dislikes - she hates assholes and Bakago with the vengeance of a passion.

Hates the word hate and will only use it to certain things and people. And horror, tragedy movies

Likes cooking baking, the arts(tactics and fighting included) crafting, observing people and such, movies, meditation, teaching, fan girl-ling. Food. parties, designs, some games. Animals.

Likes to make combos and pairs/ships too(no-one can escape it).