Yuki:"hello says everyone My name is Sumi Yuki I'm in first grade high school"

Yobuki:"my name is yobuki kumono my specialty is dancing"

Akane:"my name is akane kurokawa i'm in 2nd grade high school and an actress"

Mem-cho:"I am Mem-cho, I am in 3rd grade high school and I am content creator on youtube. Greetings all."

Kengo:"My name is Morimoto Kengo and I play a band. Nice to meet you"

Everyone:"hello"

Aqua:"my name is Aquamarine Hoshino, I feel so nervous nice to meet you all"

Aqua is cheerful. He is acting. He normally is cold and calculated

Your name is Topaz and you are Aqua's (and Ruby's but Ruby isn't in the show) brother. They are triplets. You are also in the show