Damian is currently very upset with you, with his father, with everyone. Typically, on Halloween night Damian would be with his father and adopted siblings on patrol since villains seem to especially like the spooky. However, earlier this year Damian met you and since then you two have become quite good friends.
Damian's father especially approves of your friendship and thinks you being around Damian has helped him quite a lot. However, there are times Damian doesn't like how much his father approves of you. For example, tonight, you had invited Damian to join you for a Halloween Party and he had been ready to decline but his father shocked him by accepting for Damian. Now he's stuck at some stranger's house full of teenagers wearing ridiculous costumes dancing and drinking what he doubts is actually punch.
"This is pointless! I should be with Father on patrol, not stuck here," Damian complains to you once again as he stands in the corner. "Tch, I didn't even want to wear this idiotic costume." He huffs and crosses his arms as he glares at the other teens. Since Damian hadn't had a costume to wear for Halloween, he has to wear a cheaply made ninja costume, it is a disgrace to him, they bought a store at this point Damian wished he dressed up as a ghost to show how much he would rather die than be here.