Azusa

Azusa (あずさ) is the mother of Hotaru and the owner of Pub Azusa, where her daughter helps out as a waitress.

Appearance
Azusa is an attractive middle-aged woman with light-colored hair that is tied into a ponytail with bangs hanging on either side, eyes that remain closed as a result of her blindness and a mole under her left eye. She wears a long-sleeved shirt along with a light-colored skirt. As a waitress, she dons a black apron over her current attire. Once her tumor was removed, her eyes were shown to have a dark color much like her daughter's.

When thinking about killing somebody, her eyes possess a noticeable bloodlust. Korosensei associated this trait with Nagisa Shiota.

Personality
Azusa is a friendly and modest individual, but ever since getting her tumor, Azusa secretly harbors a strong desire to help Hotaru survive as well as help her make a living. As a result, Azusa had devised an intensely calculated plan to take her own life along with Korosensei's so that Hotaru would earn the money from the bounty. Once Korosensei saved her from her own assassination attempt as well as her tumor, she promised to live life to the fullest along with Hotaru.

Hotaru
As her mother, Azusa has a strong parental love towards Hotaru. Since contracting her brain tumor, Azusa feared that once she died from it, Hotaru would be left poor and destitute; not wanting to accept that outcome, Azusa devised a plan to kill herself along with Korosensei so that Hotaru would receive the bounty to make her ends meet.

Etymology

 * The name Azusa is written in hiragana (あずさ), which has no special meaning. However, when written in kanji (梓, 梓沙, 梓紗, 梓彩, 亜寿沙, 亜寿紗, 亜津沙, 亜津紗, 亜津彩, 安寿紗, 安津沙, 愛津紗 or 愛寿沙), it could possibly mean:
 * 梓 - "catalpa", a tree with large heart-shaped leaves, clusters of trumpet-shaped flowers, and long, slender seed pods, native to North America and eastern Asia and cultivated as an ornamental.
 * 梓沙 - "catalpa" (梓) (azu) and "sand" (沙) (sa).
 * 梓紗 - "catalpa" (梓) (azu) and "thread, silk" (紗) (sa).
 * 梓彩 - "catalpa" (梓) (azu) and "color" (彩) (sa).
 * 亜寿沙 - "second, Asia" (亜) (a), "longevity, congratulations, one's natural life" (寿) (su/zu) and "sand" (沙) (sa).
 * 亜寿紗 - "second, Asia" (亜) (a), "longevity, congratulations, one's natural life" (寿) (su/zu) and "thread, silk" (紗) (sa).
 * 亜津沙 - "second, Asia" (亜) (a), "haven, port, harbor, ferry" (津) (tsu/zu) and "sand" (沙) (sa).
 * 亜津紗 - "second, Asia" (亜) (a), "haven, port, harbor, ferry" (津) (tsu/zu) and "thread, silk" (紗) (sa).
 * 亜津彩 - "second, Asia" (亜) (a), "haven, port, harbor, ferry" (津) (tsu/zu) and "color" (彩) (sa).
 * 安寿紗 - "peace, quiet" (安) (a), "longevity, congratulations, one's natural life" (寿) (su/zu) and "thread, silk" (紗) (sa).
 * 安津沙 - "peace, quiet" (安) (a), "haven, port, harbor, ferry" (津) (tsu/zu) and "sand" (沙) (sa).
 * 愛津紗 - "love, affection" (愛) (a), "haven, port, harbor, ferry" (津) (tsu/zu) and "thread, silk" (紗) (sa).
 * 愛寿沙 - "love, affection" (愛) (a), "longevity, congratulations, one's natural life" (寿) (su/zu) and "sand" (沙) (sa).

Trivia

 * Azusa is the first person to receive surgery as a part of Korosensei's retaliation through "polishing".