I got a few:
In Rdr2 my fully bonded horse died in the middle of the fight. My beloved Chelsea II was there from the beginning, when Hosea gave her to me. She died while I was fighting some bandits
I died in my Minecraft hardcore world. It kinda made me sad thinking my horse, Gina, my 2 cats, Kim, Kourtney and Kylie, my 6 dogs, Artemis, Achilles, Apollo, Aphrodite, Ares I and Ares II and parrot, Loki were still there, awaiting my return
The enslaved Vortigaunt on the HL2RP server would sometimes sneak off from the Combine and hide out in an abandoned shop.
To my character, traumatized, terrified of this new horrific dystopian world, they were my only friend, my confidant, a source of support in this depressing city.
Raids increased, Combine got more vigilant, day game that she never saw them again.