Ruichak is the ship's tech guy and intelligence officer, and he's very good at what he does. While he does attempt to take his job as seriously as possible, he does have his fun side (a side that tends to get pulled out thanks to Angela).
Despite him being physically fit and trained enough to go on missions, he rarely goes on them. Not just because he's better in his computer room, but because a lot of missions he's gone on have been with Starfrog, and they haven't always gone too well, so he'd much rather sit out.
He is quite good friends with Angela and the two of them hang out a lot, Ruichak sometimes able to repair her weapons whenever she goes crazy with them.

A lot of people were asking for him back. I do hope it wasn't overhyped.