[ Seimei smiles at Bakugo's spark of anger. It's funny, talking to this modern, enlightened young man who doesn't believe in foolish things like ghosts and spirits when he's talking to one, but that's how most people are these days for Seimei too. They may or may not notice him, a phantom in the scientific eye, but sometimes when he manages to talk to people, he gets to enjoy reactions like this. Bakugo is so lively! ]

Oh, it's definitely a building. But even buildings can carry the energy and thoughts that get put into them. Eventually they accumulate so much that they fill up the space and become an entity all on their own.

[ He grins, enjoying the way Bakugo huffs at him. Something about his short temper is actually fun. ]

Isn't that how places become haunted?