Zombie Maid

Cain started explaining what he think had happened. His transformation was still incomplete, probably unstable was the right word. At the start, the shard was keeping him awake as it was trying to merge inside him.

After a while, the shard didn't find a place to settle in his body so it started trying to transform him into a Fenrir. But since he has already become an abomination, that was impossible.

Then a clash between his soul and the Fenrir shard started, which Caused Cain to feel exhausted. His body identified the shard as a foreign object and started trying to exterminate it.

Probably he shouldn't absorb the shards in the future and instead try to find suitable holders for them. Just like Sylph with Yggdrasil seed. And now, Hati in front of him who holds the Fenrir shard.