Houjou Arei

Houjou Arei (北条彩鈴) is a student of Tokiwadai Middle School, who appears in Toaru Kagaku no Railgun: Astral Buddy.

Astral Buddy Arc
Houjou first appears Yumiya tells hers she was right about everything.

Abilities
Her ability allows her to hear people's emotions as sound. She has trained herself to interpret this emotional sound as locations, directions and distance in 3D space.

During her last battle with Hokaze Junko, she made use of Hard Taping Custom (発条包帯・改 (ハードテーピング・カスタム) ) and an electric potential elastic suit to strengthen her physical abilities.