Quasar
Azuma Yunoki decides he is a sun; beaming brightly and dazzling to all, yet not allowing anyone too near lest they get burned.
Hihara is a star, Azuma notices, shining and sparkling happily, but too far away and uninfluential to really match the sun.
Tsukimori is the moon, quietly reflecting the brilliant of its parent, quiet and icy to all.
Amou is a black hole. Tsuchura is an asteroid. Shimizu is a dwarf planet. And Kahoko-
Azuma pauses, his eyes darkening.
Kahoko is a quasar.
Quasars resembly stars, Azuma remembers from his astronomy clsas, but they emit unusually bright blue and ultraviolet light from seemingly no source. They also let out radio waves and sporadic radioactivity, affecting those around them in unseen ways.
Azuma glances around at Hihara's despondance, Tsukimori's uncertainty, Tsuchura's thought, Shoko's peaceful smile, and Shimizu's obliviousness.
He sniffs, picks up his flute.
A quasar might affect the others, he knows, stepping forward for his turn to massive applause.
But it will never outshine the sun.