[ The question brings to mind one of the last conversations he had in his world.

Come back to the magic school with me. There are strong allies there.

There’s a lump in his throat he has to shake off to respond in an even tone. Natsume had already fussed over him enough today. He didn’t need to worry him more. ]

They do. Though I’m not familiar with these symbols specifically ... there are things called curses and sorcerers who fight them.