Girlfriend cheated on me with senior, so I'll take their Mothers.

Rem is a Pokemon and Kaiju Ghidorah lover who died and went to a very powerful plane. The plane has a spiritual symbiosis beast that is a bit similar to a Pokemon's power level where someone could be a Symbiotic Beast Cultivator: A being that can transform into a kaiju and humanoid kaiju that devour worlds and kills system users like Vampire systems, Werewolf system, etc. To do that, the plane forces them to go to other dimensions, spaces, and worlds where they could hunt anomalies or system users. The main plane power level is extremely calculated and Rem's multiverse western comics and animes and All of them along with other dimensions are only like grains of sand in the beach connected to the main plane of all existence.