Originally Posted by
Golden Lark
Senbrek's speech patterns and his mental monologue sort of blur together for him now. He's not so much chatty as his thoughts and what he'd say out loud are slowly getting harder to keep apart.
He has essentially been re-purposed into a devil on Shirou's shoulder, and has to re-learn how to think. At this time when he thinks about something relevant to Shirou, Shirou tends to hear it. He'll soon get the hang of knowing when to purposely communicate or not, for their mutual sanity.