I am so grateful to hear I’ve been in your thoughts anon ;-; <333 and thank you for this lovely question!! I think mob would like to have a variety of little critters but probably couldn’t manage with all the upkeep; he’d probably pick something low maintenance like a tarantula, maybe a Mexican red knee :) he’d be so gentle and careful when handling too, would give it a variety of snacks and spend hours watching and taking pictures..

As for ritsu, I feel like he’d be a little squeamish about invert pets but would possibly take to a rhinoceros beetle, or some type of bug he and mob used to catch as kids for nostalgia sake <3 maybe he takes the extra time to learn about the beetles he keeps and relays the fun facts to mob.. I also think he’d be the type to keep a giant centipede, if nothing else than to name the feeder worms and bugs after Reigen and watch as they’re consumed like a little psychopath

Side note: I do think it would be hilarious for one of them to have a giant hissing cockroach just have Reigen’s blood pressure go up hahaha,, mob innocently showing Reigen pictures of his beloved pet roach would be adorably entertaining.. or ritsu pushing aside his own discomfort just to freak Reigen out by bringing a roach by the office in a little critter condo.. aaa I love imagining my favorite brothers with their bugs! Thank you sm anon!!