I have a lot of headcanons, but I'm going to talk about my vbs body headcanons:
Kohane: I feel like she would be definitely on the chubby side, y'know since hamsters eat a lot and An compares her to a hamster, like stuffing her face with food,,,(me too girlie, me too)
An: Lean and muscular girlie, she just gives off vibes that she works out y'know, maybe she's more specifically a pilates princess.
Akito: Also a muscular guy, but like has chubbiness to him due to his higher fat mass and of course his muscles come from high muscle mass. Like he's on a dirty bulk if you get what I mean,,,, (I feel like Ena is also on the chubbier side because of their genetics that makes their bodies store more fat than others,,,,)
Toya: That's a skinny guy over here, nothing much to add, I think the conversation with Nene explains it, he might be exercising but it's not a lot to build muscle. Also to add I think he would have moles all over his body but they are spread far apart from each other.
They might change as I continue reading vbs events because I still haven't read them all since I was busy with my assignments, I hope you understood what I wrote here