T91 てい

Type: Assault rifle

Origin: Taiwan

Agu's close friend who supports her in confessing her feelings for Funco. She is a Taiwanese T91 and is usually nicknamed "Fountainhead" by Ichiroku because of the several pigtails she wears throughout her hair. Tei also wears a G-string as her panties, in which the length can be adjusted using the string, just like her namesake gun which has a collapsible buttstock, just like the M4A1.