Lucius, or "Cherry" as everyone calls him, comes from the nine hells, and being incredibly tiny, he was often teased and messed with, but he learned to fight fire with fire. So he would often pull pranks on them. Though one day he might have gone a bit too far, being chased by a flock of angry devils, he managed to escape trough an unstable portal, that hadn't been spotted since it was his size. Coming trough it on the other end, he was met with a MOUNTAIN of a shark, about to step on him, seeing him as a threat, he thought how to escape this situation. In a hail-mary, he closed his eyes and didn't move, and laughed.
"Foolish mortal... you think you can take on an archdevil? One who has consumed a tho- a million souls!"
SOMEHOW, it fooled the giantess shark into thinking he was in fact a very powerful devil who would make her more powerful if she proves herself worthy. Cherry now has to keep up this facade for who knows how long...