DLC Idea ( HUGE SPOILERS if you haven't beaten the game).

So i was thinking, how cool would it be if we got a dlc mission where one of kelleys clone is still alive, but instead of fighting you, he asks for help in ending his " hollow man" cycle, and he becomes a companion for this mission, then when it ends, we purify kelley's spirit, so he can rest in peace and as a reward we get a purified version of uroboros, a snake guardian spirit, maybe a smithing text for his alchemist armor set as well. thoughts? from my perspective, when william is talking to kelley in the beach, kelley seems to reach out to share his guardian spirit and memory with william just like any other person with a spirit does, but william, knowing kelleys spirit is either artificial or a corrupt spirit , decides to stab him. it would be cool to see kelleys memory when we purify him, maybe he was just a normal english boy who was found by hundred-eyes and experimented on, twisting his soul until he became a homunculus or something and doomed to a cycle of being reborn into new bodies with alchemy.