Koume Moroboshi

Koume Moroboshi is the younger sister of Yuudai Moroboshi.

Appearance
Koume is a young girl with a bob-cut.

She usually wears Japanese clothing that's too big for her and an apron.

Personality
Koume is a kind and friendly person. She loves her brother greatly. Koume also can blame herself from things, that weren't directly her fault.

History
Three years ago Koume and her family were involved in an accident, which made Yuudai lose all of his limbs. Through medical treatment, his limbs were reattached but were left crippled for life.

Koume, who was the one that wanted to go to the park where the accident occurred, was traumatized by the event, blaming herself for what happened to Yuudai. This left her unable to speak. This though leads Yuudai to start rehabilitation, with the help of Kiriko Yakushi, to show Koume that he was fine. Yuudai's rehabilitation was successful and he even won the 61st Seven Stars Sword Art Festival. Despite this Koume still couldn't speak.

The Star of Naniwa
Koume was seen in the Ichiban Boshi, a restaurant of the Moroboshi family, serving as a waitress. She met Ikki, Shizuku and Nagi, who were brought by Yuudai. Yuudai explained to them about her sister's inability to speak, which he tells is psychological. Koume then shows the new customers their seats.

Seven Stars Sword Art Festival Begins!
Yuudai, just before his match against Ikki, asks for Koume to tell him to do his best, as he always does before his matches. Koume though simply writes it, instead of speaking.

During Yuudai's match, Shizuku talks with Koume, who is also watching the match. She encourages her to encourage Yuudai, who is losing to Ikki, as Shizuku can also relate to Koume's affection to her brother. Koume finally shouts at Yuudai to do his best, defeating her inability to speak. This greatly encourages Yuudai who uses the last of his strength, but still loses to Ikki, though he achieved his goal of making Koume overcome her disability to speak.

Etymology

 * The name Koume means "small" (小) (ko) and "Japanese apricot, plum" (梅) (ume).
 * The kanji "梅" refers specifically to the species Prunus mume.
 * In Japan, the ume blossom is regarded as a symbol of spring and a ward against evil.
 * Koume's surname Moroboshi means "Various Stars" (諸星).