Ruka doesn't look up at the question, though her pencil (or pen, or whatever they gave her) pauses mid-stroke for a second before it resumes.

"I... have an illness," she starts, glancing up at him briefly. "it's not contagious. It's endemic only to the island I lived on and its people." For now, anyhow, and also she's not at the point where it'd be contagious so, you know, not technically a lie. She looks back down at the paper.

"It's called Moonlight Syndrome and one of the symptoms is memory loss." She makes notes about it, too, as she talks, clinical and wooden, like she's reciting a medical paper. "Sleepwalking, the affliction getting better or worse with the phases of the moon, obsession with the moon, fear of mirrors, obsessive behavior, externalizing the self." A pause and she adds, "death. Eventually."

She rolls her shoulder to relieve the slight ache forming from hunching over the paper. "My recent memory hasn't started being affected, but it's an old habit from when I was first diagnosed. Just in case." Ruka looks up at him, titling her head. "If there's something you don't want me to remember, I won't write it."

Her memory was fine for now, but if it ever started progressing again... Well, she wanted to be on the safe side.