Once a user successfully adopts a Wiki and becomes a bureaucrat, they gain the ability to promote a Wikia user to Administrator(sysop), Rollback, Content Moderator, Discussions Moderator, Chat Moderator or another Bureaucrat. They also can remove the rights of other users up to nothing, excluding the Bureaucrat right (with the exception of their own Bureaucrat role). See w:Help:User rights for more information.
Due to this, the Bureaucrat role is the most powerful admin right among other admin/mod rights that a normal Wikia user can have and shouldn't be given out easily or abused by a tyrant.
In my opinion, I think User:Maymurs is suitable to be a bureaucrat for the Monster Super League Wikia since she was an active admin for our wiki previously and also was one of notable mods of our wiki's Discord server(currently closed), so she's regarded as a trustful person with great admin experience.