Mentioned in a few chapters in coming books...but overall, his presence is a recurring entity that resides everywhere throughout the whole series.

Spirit Powers

.<<  Multiversal Time Manipulation  >> The ability to control time across multiversal realities and dimensions so that he can freely travel to and find souls to protect.

<<  Action Replay  >>  The power to replay actions of others, events from the past, present or future visually within their mind or by projecting an energy-like projection.

<<  Deja-Vu Manifestation  >>  This allows the user to manifest déjà vu into existence. The user brings feelings of repeating events, visions of the past, or other similar phenomenon into current reality

<<  Omnipresence Knowledge  >>  The ability to be everywhere at once, past, present, and future, with the ability to foresee incoming events to absorb and obtain knowledge.

<<  Realm Transference  >>  The ability to teleport between realms and dimensions.

<<  Bestowal of Reincarnation  >>  A Cooldown power that lasts up to 100 years. Morhv can use this power to reincarnate someone back into the same world if he feels like they deserve a second chance.

and many more that relate to death….

ORIGIN

Mohrv, better known as the Spirit of Death, is the personification of death itself. When beings from different worlds (whether be multiversal or not) pass away or their time is up, Mohrv will show up at the given time, to guide them into the afterlife and to protect them. Morhv is Rimaea's rivaling partner and also long lasting friends of her. They don't intent to harm each other, but rather keep each other's sanity intact. Morhv bears the resemblance of a Ghost Vulture with panda-like patterns of a Giant Panda. Its panda-like patterns are almost like of the Yin and Yang. Althought he doesn't have eyes, he can still see through that black patch on it's head. ​