Elna Stongs

 one of the Main Characters of the Ore Dake Haireru Kakushi Danjon.

Appearance
She is a pretty woman in her early twenties with a fit body and mysterious makeup from somewhere. Also, she mentions how many of her associates (likely male adventurers) had given her several compliments about her butt.

Personality
Elna is very harsh with her students, but she doesn't mind using her sex-appeal to motivate the male students, especially Noir, getting to the point of rewarding her students by rubbing her butt on their stomachs and faces.

Background
She is Noir's teacher.

Elna was a mercenary from the ages of 7 to 24, but under some circumstances, she becomes a teacher in Hero Academy just last year.

She teaches the S-Class students.

Status

 * -|Anime=
 * -|Manga=

Trivia

 * Because her physical activity was reduced when she became a teacher, Elna tends to get extreme muscle stiffness.
 * She once had Noir pose as her lover to get out of a marriage interview set up by Hazlo.