She would've... ignored him and kept walking, probably. She would've seen through that sort of behavior right away (especially since she does the exact same thing herself to the point where she even had a similarly functioning NPC in her own heart) and if he had still insisted in getting in her way she would've gone into a thorough explanation of how his behavior was obviously an attempt to hide something and made it quite clear she understood exactly what was going on. :)

This is not related to the heart but since I'm curious, which teams does Battler have the best or strongest impressions of? WELL I GUESS I COULD ALSO TIE THAT INTO HEART and ask which team rooms in his heart were the most significant/planned out!