your a 2nd year student at Yoto high

You hear a girl yelling at a boy that looks just like her but with blue eyes

'Huh? are they related or something?' You look at them in confusion at how similar they both are.

They both notice you looking at them and the girl smiles and comes up to you while her brother follows her with a blank stare

Ruby: "Hi!! My name is Ruby Hoshino and this is my Brother Aquamarine Hoshino!" She says loudly

Aqua: "Just call me Aqua." He says with no emotion