Miyuki Shibuya（Irregular at Magic High School）

出典 : Amazon.co.jp

The heroine of “Irregular at Magic High School” and the younger sister of the main character, Tatsuya Shiba.
At the beginning of the story, she was a first year student at the same grade as Tatsuya, but later moved up to the third grade. The “Onion” is a term of endearment that has become synonymous with her work.

Onii-sama, which has become synonymous with her work, is a term of endearment when she calls Tatsuya.
Although she herself is the most beautiful girl in the school and has a powerful magical power, her respect and admiration for her brother is still It doesn’t stop.
She is a true example of a sister character.

However, in her case, whether or not she should be considered a real sister is highly debatable.

The voice actor in charge of the anime is Saori Hayami.

Yakumo Tukamoto（school rumble）

出典 : Amazon.co.jp

She is the younger sister of Tsukamoto Tenma, the female protagonist of “School Rumble”.
At the beginning of the story, she was 15 years old, but later she became 16 years old in the story.

In contrast to her elder sister Tenma, she is a quiet and beautiful girl, but her innocent older sister is not envious, and Yakumo also admires her with all his heart.
She also has a peculiar tendency to be able to see the hearts of the opposite sex that likes her, which causes her a lot of trouble, but when she meets Harima Kenji, who is devoted to Tenma, she becomes curious about him and starts to care about his presence, and eventually she and Sawachika Eri become the heroine of the work.

The voice actor in charge of the anime is Mamiko Noto.

Yui Hirasawa（K-on!）

出典 : Amazon.co.jp

K-On! She is the younger sister of Yui Hirasawa, the main character of the movie, “The Little Prince of Wales”.
She is one grade below, and later she entered Sakuragaoka High School and belongs to the light music club.

She is the complete opposite of her careless older sister, she has a serious personality.
On the other hand, she is a bit morbidly in love with her older sister, and is able to change into her sister so well that the people around her don’t notice her for a while.

In the famous song “U & I”, Yui wrote the lyrics about her and Yu’s feelings for her.

The voice actor in charge of the anime is Yonezawa Madoka.

Kotomi Tuda（Student Council Officers）

出典 : Amazon.co.jp

The younger sister of Takatoshi Tsuda, the main character in “Student Council Members”.
In the story, she enters the same school as her brother and has been interacting with the student council.
She gets along well with her brother and calls him “Taka” and looks up to him.

She has a cheerful and friendly personality and is a chuunibunin.
Although the story is mostly down to earth, she is in charge of not only the erotic jokes but also the chuunibunny part.

The voice actor in charge of the anime is Shimoda Asami.

Haru Onodera（Nisekoi）

出典 : Amazon.co.jp

She is the younger sister of Kosaki Onodera, one of the heroines in “Niseikoi”.
In the story, she enters Bonyari High School, the same school as her sister.

Her face is quite similar to her sister’s and they get along well.
On the other hand, she was wary of the main character Raku in the beginning because she believed in the rumors around her due to her wild assumptions, but she gradually came to understand and realized that she was in love with him.

The voice actor in charge of the anime is Sakura Ayane.

Ruby Kurosawa（ラブライブ！サンシャイン!!）

出典 : Amazon.co.jp

Love Live! She is a member of the school idol group ‘Aqours’ of ‘Sunshine! and a member of the school idol group ‘Aqours’ of ‘Sunshine! She is the younger sister of Daiya Kurosawa.
She is two years older than her sister.

She doesn’t look much like her sister, and their personalities are polar opposites.
Maybe that’s why her sister dotes on her to the point of being overprotective.

In the beginning, her unreliable side was noticeable, but she has grown up through her activities in Aqours, meeting her rival, Saint Snow’s KAZUNO Ria, and through friendly competition.

Her voice actor for the anime is Ai Furihata.

Umaru Doma（Himouto! Umaru-chan）

出典 : Amazon.co.jp

“Dried-up sister! She is the younger sister of Tahei Doma, a.k.a. Taihei Doma, the protagonist of “Umaru-chan”.
She lives with TAIHEI and is an honor student with a fancy exterior, but is sloppy in real life, leaving all the housework to her brother.
Although she is a 15-year-old freshman in high school, she has a lot of selfishness and is quite dependent on her brother.

At one point during the production, she was asked if she wasn’t actually his sister. The suspicion that she was a younger sister also surfaced, but she was definitely her own sister.

The voice actor in charge of the anime is Ms. Aimi Tanaka (Tanaka Aimi).

Miya Tatibana（Amagami SS）

出典 : Amazon.co.jp

She is the younger sister of Junichi Tachibana, the main character of “Amagami SS”.
She is a freshman in high school, one year younger than Junichi, and although there was an attack route in the original game, she does not have romantic feelings for him.

She is a spoiled girl who calls her “big brother” in front of other people and “nini” when it is just the two of them.
She calls herself “mia”, which reminds me of a cat.
She sometimes annoys her brother with her childish words and actions, but she seems to be a big fan of him.

The voice actor in charge of the anime is Kana Asumi.

Rem（Re:Starting from zero in a different world）

出典 : Amazon.co.jp

She is one of the heroines of “Re:Zero to Start a New World Life” and the younger sister of her twin maid, Ram.
She is 17 years old.

She is famous as a heroine who is single-minded and devoted to the main character, Natsuki Subaru.
It seems like she doesn’t have much of an image of a younger sister character, but after the second season of the anime, we should be able to feel Rem as a younger sister as her older sister Ram is brought into focus.

The voice actor in charge of the anime is Inori Minase (Minase Inori).

Hell’s Fubuki（One Punch Man）

出典 : Amazon.co.jp

She’s the younger sister of the S-class hero of “One Punch Man”, the second place finisher, Fierce Tatsumaki.
Her age is 23 years old, which is quite old for a younger sister character.

She has a personality that is very different from the existing image of younger sister characters, and her appearance is also sexy.
On the other hand, her complex towards her sister and the overprotective side of her sister Tatsumaki are also noticeable, and her sister character is also very much a sister character. You can see it everywhere.

The voice actor in charge of the anime is Saori Hayami.

Summary

Rather than being bound by the existing image of a “younger, protective character”, it’s more like a younger sister character that is loved in a way that only a younger sister can be.
There are many different types of sister characters, but they are all very cute!