OH VERY GOOD QUESTION!!!! i originally wanted eichi to be cinnamoroll but niki alr got it soooo id say maybe pompompurin only aesthetics/color wise. for tatsumi (and ik its quite obvious) but i think keroppi would be cute :) but i also think hanausa from the sugarbunnies universe would fit quite well . keroppi's known to be good at singing which i think is nice considering the fun fact that tatsumi has perfect pitch and hanausa is a florist bunny which goes well with the fact that tatsumi is in the gardenia circle and is often compared to a bunny by many.