I love how different Reigen's boys are. Mob, naïve and hopeful as he is, would confess to his shishou multiple times, especially once he's older, even though deep down he knows that it's not so easy to earn Reigen's acception — not for his young old feelings, at the very least. But he would try, again and again, touching Shishou the ways he shouldn't, his eyes always tracing Reigen's frame, and following his measured steps. Mob isn't the one to give up.
Ritsu, on the other hand, is logical and pragmatic, he stands firmly on the ground and not flies between the clouds like his nii-san. He sees reality a little more clearly, a little more pessimistically, his vision is not blurred by love or hope or Reigen-san's kindness. Reigen is kind, Ritsu can admit it now — never to Reigen personally, though. So Ritsu knows more than anyone that this kindness would never let this man accept a confession from someone so young, someone he cared for when they were a kid. That doesn't stop Ritsu from showing his affection towards Reigen-san in his own reserved and modest ways. Ritsu is the one who loves quietly.
And Teru, oh boy, where do I start with Teru? Firstly, he's a mix of both Kageyama brothers: bright and hopeful as Mob is, but isn't straightforward and persistent enough. Realistic like Ritsu, but not reserved and shy enough. He's aware of Reigen's morals, he's aware of how Reigen sees him and Mob and Ritsu — as kids. Yet he can't help but flirt; it's just who Hanazawa Teruki is, playful nature, starry eyes, gentle touch, and kind smiles that make all the girls melt into a puddle. He's a gentleman: he carries Reigen-san's bags after a shopping, and helps him put on his coat when they need to walk out of the office or the restaurant, or even offers to pay for Reigen's drinks and food. He gives him compliments. Reigen is visibly uncomfortable with everything, always rejecting Teru and his generous offers and his more-than-just-polite help, but Teru is unable to stop. He likes to surprise Reigen-san, his best friend's crush and long-term shishou. He likes to see how Kageyama-kun's eyes grow wide and dark with jealousy. Teru is a golden retriever boy, but he's also confident and competitive. He's the one to fuel the fire of rivalry.
