"Starfarers" character designs

I'm a big Nintendo fan who grew up in the 90s with the SNES which since then I've always been a fan of the STARFOX games. I wanted to practice some character design with designing my own ragtag crew of aliens. The blue rabbit is the Pilot, the goldfish looking guy is the engineer, the blue bug is the intelligence officer, and the purple buff guy is the muscle/ security.