Lieutenant Kayshon was a male Tamarian. He became Shaxs’ replacement as Head of Security on the Cerritos after his death. The universal translator could not always translate Tamarian, which was a language of metaphors. He was the first of his species to join Starfleet, and struggled sometimes with speaking Federation Standard. He was assigned the task of leading the team responsible for inventorying Kerner Hauze’s collection after his death, and was transformed into a puppet during the mission. This was only temporary, however, as Dr. T’Ana knew exactly how to bring him back.
The mineral the Pakleds were after in their pattern of attacks on various Federation outposts. It was highly volatile when subjected to plasmic vibrations, and when it exploded it could release an ion cloud that disrupted transporters. A band of terrorists once tried to use it to blow up starbase 58.
Male bridge officer aboard the U.S.S. Titan. William was created when Brad Boimler saved his Titan crewmates from the Pakleds and there was a transporter malfunction that created a clone. Starfleet then mandated that one of the clones had to return to the U.S.S. Cerritos, because having both of them aboard the Titan would be too awkward for the crew. As a result of Brad misunderstanding William’s intentions, he was the one to volunteer to return to the Cerritos and be demoted back to ensign, leaving William to stay on the Titan in the rank of Lieutenant junior grade.
Chairman Siggi was a male octopus-like species who was Chairman of the Collector's Guild. He was killed when a giant Vulcan skeleton fell on top of him while he was trying to escape Kerner Hauze’s weaponized ship.
A planet that was the location of the varuvian mining colony the Pakleds were about to target when the Titan sent an away team to embed themselves undercover as miners and plant a tracking device on their shuttle. Boimler was part of that team.
Humanoid species that lived on Apergos and called their leader the Apergosian High Leader. They had recently become warp-capable when the Cerritos was tasked with second contact. They were in the middle of an industrial revolution at the time, so everything was covered with soot on their planet. They also had a deep relationship with numbers, so choosing their Planetary Federation Communication Number was a more difficult task than expected.
Jennifer was a female Andorian officer aboard the U.S.S. Cerritos. She was a member of a group of ensigns who called themselves The Redshirts and focused on making themselves into leadership material - by honing their posture, their stride, and their inspirational speeches. Jennifer saved Mariner after the Cerritos was hit by debris and she flew out the front window where the viewscreen had been removed, and they became friends as a result.