5E build (Allen Walker) From D. Gray-man

Hi,

I was curious to have your take on how you would build Allen Walker from the manga D.Gray-man.

I want to create a similar character for a future campaign and have trouble identifying in him in a class or build.

any idea?

character: Allen Walker | D.Gray-man Encyclopedia | Fandom

My first reflex is the following:

Race = aasimar (considering his Noah heritage), could be Tiefling as well..

Class  = Warlock with the "Innocence" as the HexBlade Patron

SubClass = Pact of the Blade (manifestation of his sword from his arm)

Eldritch Blast to mimic the power blast from his arm

Hexblade's curse could be the "exorcism cross" bind