The knock on Erik's door came after most of the Xavier School's students had come and gone. After last year's bizarre encounter, Erik was not surprised to see Peter.
Without being prompted, Erik said, "And you are?"
"Can't you guess?"
Erik stared dumbly at Peter's costume, which involved a lot of armor, leather, what might have been half a fur rug around his shoulders, and most eye-catchingly, a helmet with large curved horns. The overall effect was that of a particularly uninspired supervillain. "Give me a hint?" he said.
"Lief."
"...Leaf?"
"Eriksson," said Peter.
