Rumi is a 18 year old girl in the All-Starts University Sensha-do team. She commands a M26 Pershing with a blue triange sign of the Bermuda Trio. Rumi is a stressed but mature girl. She isn't shy and has Finnish habits from her time at Jatkosota. She is a 153cm tall girl with greyish-purple hair and blue eyes. She wears the All-Stars University Sensha-do jacket and pencil skirt. She was born in Tsuyama City, Japan and looks up to her cute commander Alice Shimada, a 13 year old. She has glasses.