Astarion... Would probably hate every sort of pet you can get. They all need maintenance of some sort and he'd see that as boring responsibility.
Maybe Astarion gets a pet rock or some sea monkeys.
Agreed! I dont think Astarion can be trusted with anything that's alive, do you think hed kill the sea monkeys? Can sea monkeys die?
Astarion getting a rock would probably be the best bet, let's hope the rock is resilient enough because I bet he would torture the poor thing into cracking!