Chleo still remembered many young people often invite her to arcade games when she was in school. Since she didn't want to be followed by the guards, which would embarrass her later, she often let Diego tagged along with her.
She also remembered Diego cunningly challenge her friends to play this kind of shooter game. Diego always came out victorious until her friends felt embarrassed, especially when Diego mocked and blabbered out about his shooting skills.
Chleo never scolded Diego but instead laughed along with her brother. She was even proud of Diego and had never been mad at the boy until her friends called her the bias queen.
Well, Chleo was always biased, and she gave no care.
That's why she was delighted to see Diego could immediately get along with Max.