The Quartet
The main characters of the story! They all have groups they're part of, but they're important enough to have their own group - they're the POV characters, after all!

The upbeat time machine who wants to figure out his past.

A talented Aresian engineer who will never let themselves fail.

A passionate astroneer aiming to quench her planetary vengeance.

A helpful but snarky AI trying to find her true self in the process.