i don't see it talked about enough how much tsukasa cares about and trusts rui. especially in the scene of that last screenshot- tsukasa has a hard time generally when it comes to confiding in people, typically he deflects or dismisses it with something like "oh it's nothing!" but you don't see that here. because here, he opens up to rui and tells him truthfully how being in the presence of professionals had made him feel insecure, which is something he would have otherwise kept to himself. and rui responds in a way that is reflective of not only the lesson he's learned from the event but also what tsukasa *really* needs to hear (as the perfectionist tsukasa has a tendency to internally belittle himself and feel lesser for not being 'more' like the arcland members were). and there's something about the wording "it's oddly reassuring to hear that from you" that feels so soft and almost kinda vulnerable?? i think it's because he says its reassuring "from you". it could've been so easy to just say 'it was reassuring to hear' but no

these are only a couple screenshots as well, this doesn't even really mention how he's always trusted rui to keep him (and the others) safe even when his ideas are risky and dangerous. i havent read the halloween story since i first started playing but from what i remember, even in that he was primarily concerned for rui, because rui had started withdrawing and holding back from him (which tsukasa never would want!!) then subsequently in future events when he sees rui's pained expression stemming from being insecure about directing (be it due to other people or hurting the troupe) he's always trying to prevent him from holding back again and reassuring him!!

basically, tsukasa values rui's opinions, ideas and overall wellbeing so much!! even from day 1 of meeting him!!