The setting is space, we have a colonized moon Yola-91 with a moon base and couple of other things, and users on the platform can equip avatars. So the avatars are the characters I’m looking for.

The characters: (1) A sentient cloud, (2) a squid (or an octopus or cuttlefish, you decide which cephalopod), and (3) a praying mantis.

All three are aliens, you decide if they need space suits, and how they look.