Riva

In the first episode Brennan shows the Red Hot's comms officer Riva in an enormous glass sphere of water at the center of the bridge SOE1·00:06:55. Riva introduces themself as "the comms officer slash unpaid intern", and the character card gives their pronouns as they/them and says they are a nonbinary character from an aquatic alien species with fins, scales and webbed hands SOE1·00:07:09. Brennan's flashback shows their Aguatunisian people sharing "one mind, one heart", hiding nothing from each other, and Riva says they are excited for their gallivant SOE1·00:22:13 SOE1·00:22:15. In the fight Riva tells the gunner channel "the captain is thinking about swapping us for his freedom", and later urges "Believe in yourself, Captain" SOE1·01:20:27 SOE1·01:29:02.

Riva is the Aguatunisian comms officer of the Wurst, a psychic who fights and scouts through a psychodrone, and who leaves the crew at the end of the season to go home SOE1·00:06:55 SOE18·03:01:14. In the second episode they reach into the Skipper's mind and find a brand new consciousness in his body SOE2·00:25:24. They ask the captain's new self for a promotion, "if I could maybe move up to assistant", and sell Pleasure Putty through a yellow psychodrone SOE2·00:38:08 SOE2·01:31:33. In the third episode they read Gust Weatherall's surface thoughts and decide not to tell Skip, "that's too sad. Let him think that he likes him" SOE3·01:21:01. They turn a bachelorette party into Pleasure Putty salespeople SOE3·01:15:40.

In the fifth episode Riva throws Jan de la Vega off the station and says "I feel that was really uncalled for" SOE5·01:52:13. In the sixth episode they say "Sorry, I'm bad at hiding peoples' secrets because we don't have them in my culture", and offer Zortch the position of unpaid intern SOE6·00:27:14 SOE6·00:58:24. In the seventh episode they cast Psychic Concealment on Gnosis and Zortch, and give the crew aquatic rebreathers SOE7·00:20:08 SOE7·00:20:20. In the eighth episode the Sheriff's cold cone ices over their drone, which Brennan says is imprisoned SOE8·00:28:28 SOE8·00:29:03. They tell Crunch "No, I'm actually an Aguatunisian in a psychic drone" SOE8·01:44:20.

In the tenth episode Riva's Probe Mind on Skip sees the weather-beaten face of Gust Weatherall SOE10·01:08:43. At Fantanimalland they teach Aguatunisian interns about ownership and leave fridge magnets on their tank, "These are yours and you own them" SOE10·02:17:03. In the eleventh episode they face Barry Nyne aboard the Wurst and make him hallucinate the Princeps passing through the door to the escape pod SOE11·00:52:28. He leaves in the pod saying "Thanks for the ride, fish!", thinking he has the Princeps SOE11·00:55:48 SOE11·00:56:00 SOE11·00:54:22. In the twelfth episode they cast Psychic Concealment on Gnosis every day, "It's costing me a lot of spell points" SOE12·00:34:15 SOE12·00:34:24. They describe their species as "five people who all have to be madly in love with each other" and "I'm one of 10,000" SOE12·01:06:45 SOE12·01:07:07. They perform the brain surgery on Skip's body in the drone SOE12·02:17:07 SOE12·02:19:39.

In the thirteenth episode Brutus shatters their drone body in the Battle of the Brands, and a spare psychodrone wakes back up SOE13·01:19:38 SOE13·01:19:59. In the fourteenth episode they say they are "a seventh of a millionaire", and pitch Pleasure Putty to Khloe and to the nuns SOE14·01:04:57 SOE14·01:04:31 SOE14·01:26:56. In the fifteenth episode the drug in the water deactivates the psychodrone, and the real body is held in a drugged bulb SOE15·00:13:21 SOE15·00:13:34. Riva shares Skip's vision with Gunnie, opens a channel to Barry, and bargains with the Galactic Girl Guides for 100,000 credits' worth of cookies SOE15·00:54:57 SOE15·01:02:41 SOE15·01:21:29. They tell the guard Phil "I just learned about a new thing recently, and it's called a union" SOE15·01:27:57.

In the sixteenth episode Riva asks Phil "So, what's your deal? Are you like, in a relationship?" SOE16·00:09:59. They relay Gunnie's and Skip's instructions between the cells SOE16·00:42:57. They are freed from the bulb, and later blow up the psychodrone as a distraction SOE16·01:08:13 SOE16·02:18:01 SOE16·02:19:41. In the seventeenth episode they hold every caller with "please hold" as the fleets arrive SOE17·00:12:46. In the last episode Riva, aboard the UFTP ship, says "Sorry! Not personal, I'm sure you're just doing your job" as they fill it with force SOE18·00:34:30. They broadcast Skip's memory on every Amercadian channel and talk to Admiral Analinda Weatherall SOE18·01:58:59 SOE18·02:00:54. After the wedding Riva sends everyone a psychic goodbye and hitches a ride on the next starship home, in what Siobhan calls an Aguatunisian exit SOE18·03:01:46 SOE18·03:01:58.