i was thinking like when the truth go out and garu say "Karu don't want to talk to me about how he know rei"... and graphically in my mind was karu shutting the door and garu knock it in tears because he want know... same when garu now know and he didn't want to talk with karu either

or in the winter event garu know that karu is gone because he found the "house" in a mess and evrything about karu is broken or gone and he isn't in his room...