Without a doubt he wouldn't WANT to be a DAA, but would the rest of the community scout him out and even count him as an unnumbered DAA like Roa? Also, what's an Ultimate One again? Haven't read Tsukihime.
EDIT: Also, there's the question of what Ultimate Kars would count as in the Nasuverse, and the same goes for the Pillar Men in general.
EDIT: Also, would Zelrecht and Funny Valentine be best bros, frienemies, enemies, or what? They'd certainly be aware of each other considering they have basically the same powers.