Looks -
Personality - mix of aizen sosuke(bleach), kisuke urahara(bleach), itachi uchiha(naruto). And professor franken stein(soul eater)
Race - vampire(hellsing alucard version)/wraith(ghostly)/demon(seven deadly sins version) trybrid
Powers:
Vampire: Full Control over Electrokinesis and Umbrakinesis.
Wraith: all of obito mangekyo sharingan abilities(long and short range kamui)
Demon: all demon mode(demon mark, sealed wrath mode, assault mode), All kaneki kagune(all the way to full centipede/ hair color changes with kagune mode example: regular/ four rinkaku tendrils - Deep red Hair color, Half Kakuja/Half Cetipede - Haise Hair, Full Centipede/Full Kakuja - complete Black hair
Mate: alice( jasper is mated to generic AU edward sister)
Forms:
4 Rinkaku Tails(only the tails and hair is the same color as the kagune)
Half Kakuja/Centipede(only the limbs, Mask, and the hair is just like haise)-
Full Kakuja/Centipede(Only the Limbs, Mask, and Hair is fully black now)-
Demon Mark Stage one(on right side of neck)-
Demon Mark Stage 2/Sealed wrath(also has boruto karma markings going up the fast from the symbol)-
Demon Mark Stage 3/Assault Mode(Different Wings)
Demon Mark Stage 4/Demon King Mode(looks the same as stage assault mode but with these wings and black sclera with yellow eyes)-
Note 1: the clothes form out of darkness
Note: Character introduced in the same timeframe as when bella meets all the other cullens at their house