“Didn’t you know? Sage Lain is a vampire.”

“But she was perfectly fine standing in the open sunlight on the roof!”

Being undead, vampires were weak to sunlight. That was just common sense.

“Miss Lain’s class is Origin Blood. As the highest rank of the undead, she is also known as the Queen of Undeath. For someone of her level, sunlight is nothing to be concerned about.”

-Volume 1 page 106