"Greetings Rui-San, my name is Kato Usagi, but Kato is okay with me." He said brightly to Rui, the other one of the pair, the shorter one, went off to speak to somebody else. Kato would listen but it be better if he listen to the group he in, and he's not that nosy of a guy. "Do you want to play?" He asked Rui. 

Kato was honestly wide awake now and he wasn't playing that much attraction to Chiko's and Kami's conversation. He only heard a 'A-HA' from Chiko, Then he looked towards Sachiko yell to see a girl stuck in Sachiko death grip. Kato reply was simple. "Greetings Ayano-San, I hope your having a good day, besides Sachiko death grip." He said quickly, he guessed she doesn't want to deal with groups, and he wanted to respect her implied wishes. She has became recluse in the past year and he respects that she would like to be by herself, especially what she went though, she easily had it the worst of the group. He looked back to Rui, "She's a childhood friend of ours, and bit of an introvert." he told to Rui, "This arcades seems to be the place to meet a childhood friend at random."