cross code cave inn characters

[Cripplus]

in the cave inn on the second floor the first room on the right there is a group of unique characters with customs sprites that are reminiscent of an anime style. was wondering if anyone knew if this was a reference of some sort? or a backer? I can't find anything on it

[Merim]

Its from a crossover card game.

[Cripplus]

alright thanks I was wondering