Phillip

Phillip is a recruitable character that can be found in the abandoned church at Straight Down City, by continue moving right after finding Beatrice's house. To recruit him you need to give Maria a scroll of darkness, summoning him, then defeating him. If you keep using dark scrolls, Phillip will have his HP increased until it can't anymore, then he learns the skill "EAT" and becomes maxed out.

When you fight him, the game describes him as "You cannot grasp the form of this creature", making a reference to Giygas, the final boss from Earthbound/Mother 2. Phillip has influences from Space Funeral, having the same name as the main character from that game, and looking similar to Blood Ghoul, one of the bosses.

His quirk in battle is having the skill "SUFFER", that slowly changes what it does as you keep using it.

The game itself describes him as:

"Has a painful, unforgettable past. It's too late for him."