You can tell a lot about a person by the way they treat droids. The original trilogy made sure to show that the Empire treated droids like mere tools to be used and discarded, while the Rebels relied on them, treated them like part of the team, and some even struck friendships with them — from Luke and R2, Poe and BB-8, or the Ghost Crew from “Star Wars Rebels” and Chopper.
Indeed, the more despicable a character, the worst they treat droids, like Jabba having a literal torture chamber for his servant droids. During the Clone Wars, the Separatists relied on droid armies, but we often heard the battle droids complain about their treatment by their superiors in the animated show. “Solo: A Star Wars Story” took this a step further by having L3 lead a droid revolt at an Imperial work camp, with that movie being the first time “Star Wars” actually confronted the way droids are treated in the film franchise and argued they deserved better.
Which brings us to B2-EMO. From the moment we meet him, “Andor” makes a connection between the way Cassian treats his adoptive mother’s droid and the way he one day treats his friend K-2SO. What little we’ve seen of B2-EMO, he’s more than just an aid to Maarva, more than a pet, he is a member of the family, and he is grieving.