While the younger human was still stammering and blushing like a fool, the elf was starting to get angry at her!  "Mikasa, I don't know what kind of foolishness you're up to this time, but cut it out.  My apprentice here needs healing, and with what I've been donating to keep this place here, I'm not about to take no for an answer."  After a moment, he began to move towards her, very aggressively.  "Come on boy, if she won't heal us, I know how to convince her otherwise."