Koume Moroboshi

Koume Moroboshi is the younger sister of Yudai 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 Yudai lose all of his limbs. Through medical treatment his limbs were reattached, but was left crippled for life.

Koume, who was the one that wanted to go to the park were the accident occurred, was traumatized by the event, blaming herself for what happened to Yudai. This left her unable to speak. This though lead Yudai to start rehabilitation, with the help of Kiriko Yakushi, to show Koume that he was fine. Yudai'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 Yudai. Yudai explained to them about her sisters inability to speak, which he tells is psychological. Koume then shows the new customers their seats.

Seven Stars Sword Art Festival Begins!
Yudai, 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 Yudai's match, when Yudai starts losing Koume finally shouts at him to do his best, defeating her inability to speak. This greatly encourages Yudai who uses the last of his strength, but still loses to Ikki.