Yuu, En, and Mii

 is a character in After the Rain.

Personality
They seem to to have a joint personality which is bright, loud, and extroverted.

Appearance
Yuu, En, and Mii are always together and never displayed apart in the anime or the manga.

Other
Akira- They seem to be close acquaintances in Akira as she is seen sitting with them sometimes, but never actually seen to go up to them herself.

Trivia
Their name actually sounds like the English phrase You and Me which is what it was based on.