You get 1 EGO a sinner has and they get an ID of that EGO (like fell bullet ID/EGO yi sang, Magic Bullet ID/EGO Outis, Magical Girl ID/EGO Don etc)
Must be an EGO they already gave.

For me it would be Asymmetrical Inertia Heath. I think his design is pretty simple but cool as an outfit and id like a new tremor ID for him so he can leave Oufi.