Landlady

She is a short, elderly lady with short grey hair and wrinkles. She wears a purple jacket over her yellow turtleneck and wears sandals.

Somewhat of a cold blooded woman, she has absolutely no qualms about hosting a gang of criminals in her building so long as they pay their rents on time. She became enraged enough with Saitama for defeating the criminals for their bounties that she kicked him out after taking all of the money he earned.

She came to visit her tenant Saitama, to collect the rent. After Saitama tells her he would pay later, she informs him he hadn't paid his rent in three months and would kick him out if he doesn't quickly. After Saitama defeated some criminals, she angrily informs him that they were her tenents and main source of revenue and promptly kicks Saitama out on the streets.

(Source: One Punch-Man Wikia)