She is the main character of the series. In the beginning of the series, Yumi is bashful beyond words, very timid and unsure of herself. She first met Sachiko, the star of Lillian School and had her tie fixed by Sachiko, which mortified Yumi. Yumi's friend, Tsutako Takeshima, took a cute picture of this and wanted to display it in the school festival. Tsutako got Yumi to ask permission from Sachiko. Other characters often comment on how her emotions 'show on her face'.

~!After Yumi first meets Sachiko, Sachiko is arguing with the Roses in the Rose Mansion. The Roses say that Sachiko cannot object to their plan, as she did not have a petite sœur. Sachiko runs out of the meeting and knocks Yumi over. She asks if Yumi has a grande sœur, and promptly offered Yumi her rosary. Sachiko thought that if she had a petite sœur, the Yamayurikai could not force her to play Cinderella alongside a male. Yumi refused Sachiko's rosary, as she would be accepting it for the wrong reasons. Sei Satō offers a bet to Sachiko—if she could convince Yumi to be her petite sœur, the role of Cinderella will go to Yumi. If she could not, she must play Cinderella. Sachiko tells Yumi that she, Sachiko, will definitely become Yumi's sœur. But deep inside Yumi, she feels terribly hurt by how nonchalantly Sachiko chose her randomly as her petite sœur; but despite this, she feels that precisely because she still likes Sachiko very much, she has "summoned the last vestiges of her pride to refuse Sachiko's rosary, and wishes Sachiko to at least understand how hurt she feels to be 'just a random pick'".!~

~!At a dress rehearsal for the play, it is revealed that the male who plays the prince, Suguru, is Sachiko's cousin and fiancé. Sachiko accuses him of going too far and runs away; Yumi follows her to the greenhouse. Yumi at first thinks that she cannot do anything for Sachiko, but Sachiko cries on her shoulder. Yumi offers to take the rosary, but Sachiko refuses. Sachiko tells Yumi about the arranged marriage, and that Suguru does not love her, but she loves him. After the play, there is a bonfire. Yumi thinks sadly that she would not have an excuse to have anything more to do with Sachiko, but suddenly Sachiko appears and offers Yumi her rosary; this time, Yumi accepts.!~

~!When the third years are about to graduate, Yumi asks Sei if she had anything to ask her, like taking care of the stray cat Goronta, or looking after Shimako. Sei says Yumi is the type of girl who will help even if not asked, so she is not worried about Shimako. Sei instead asked for a kiss on the mouth as a parting gift; Yumi tried to run away, but Sei hugged her. Sei thanked Yumi for helping her pass her examinations, since Yumi gave Sei a reason to live again. She also said that Yumi tried to run away so that it would not be Sei who was leaving her, but the other way around. Yumi realized that this is true. Yumi often gets hugged by Sei throughout the series, who thinks her to be very cute, which sometimes makes Sachiko angry due to jealousy. Yumi finds out from Shimako, however, that Sei would actually be going to the Lillian's Girls' University, which is in the same area as Yumi's school. She gets angry at Sei for not telling her, but is happy because Sei will not be leaving her after all.!~

~!After the third years graduate, spring comes, along with the arrival of Tōko, Sachiko's cousin. Yumi feels jealous of Tōko's closeness with Sachiko, but does not say anything about it. Yumi later finds out the truth about Sachiko's grandmother dying. At the day of the funeral, Sachiko apologizes and Yumi says that she loved her onee-sama very much.!~

~!At the beginning of the OVAs, Sachiko invited Yumi to her summer home for a vacation. Sachiko's acquaintances make trouble for them, especially Yumi. They later invite Yumi and Sachiko to a party which turns out to be the eighty-eighth birthday party of one of the acquaintances' great grandmother. The acquaintances ask Yumi to play a musical instrument. Yumi says that she is no good at playing anything, but sings the song "Maria-sama no Kokoro," with Sachiko accompanying her on the piano mid-song. The great grandmother applauds and congratulates Yumi for her song, because it brings back memories. She calls Yumi a cute angel, and asks her to visit next year. That ultimately foiled the acquaintances' plans to embarrass her.!~

~!In the second OVA, Yumi sets up a casual meeting with the Yamayuri Council and the Hanadera Council to discuss the upcoming festivities for both schools. Yumi did not inform Sachiko of the meeting, because of her hatred for men, and planned to trick her into attending. However, Yumi felt she was betraying Sachiko and confessed her intentions. Yumi felt that Sachiko should attend on her own free will, because she will find herself in similar situations in the future. Sachiko noted that Yumi has learned to handle her well and that she happily complies with her wishes. We also learn about Yumi's "type" through a conversation with her brother. She describes ones who are pretty, smart, who at first seem like they have warped personalities but on the inside are warm-hearted. Yūki remarks that she's describing Sachiko, much to her surprise.!~

~!Yumi is tasked by Sachiko in the fourth season to look for a petite sœur. By then, she has already an increasing involvement in the Yamayuri Council. Also, a slow but steady change can be seen in her (especially after Tōko comes into her life) - Yumi begins to try to mature out of her own shell and to become more independent, calm and collected.!~

(Source: Wikipedia) 

At Lillian Girls’ Academy, a renowned all-girls Catholic school, pairs of girls become soeurs, or “sisters”, in order to support and guide each other during their time at school. The shy Yumi Fukuzawa thought she was far too ordinary to attract a soeur as popular and beautiful as Sachiko Ogasawara, but for some reason, Sachiko has set her sights on Yumi — but why does she want to become Yumi’s soeur, anyway, and just what will become Sachiko’s soeur entail? 
 
(Source: Maiden Japan)

__Agency:__ I'm Enterprise

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__Non-anime roles:__
• Yoimiya - Genshin Impact (VG)
• Hera - Aether Gazer (VG)
• Fu Ji - Mahjong Soul (VG)
• Cermia - Epic 7 (VG)
• Melania - Reverse: 1999 (VG)
• Carlotta - Wuthering Waves (VG)

The second season of Maria-sama ga Miteru. 
 
The spring term is beginning for the students at Lillian Girls' Academy. Friends are reunited, but for the Yamayuri Council, it's a bittersweet time. Yoko, Eriko, and Sei are busy preparing to depart Lillian while Sachiko, Rei, and Shimako are doing their best to ensure that their dear sisters receive a memorable commencement. 
Sei's departure will leave a sizable hole in the White Roses, and filling it won't be easy. But is there anyone who could appeal to Shimako enough to become the next Rosa Gigantea en bouton? 
(Source: RightStuf)

The fourth season of Maria-sama ga Miteru. 
 
Life for the young women at Lillian Girls’ Academy couldn’t be more exciting! The Yamayuri Council is working on a theater production with the all-boys Hanadera Academy, and the school festival is quickly approaching. But Yumi’s duties pale in comparison to the task assigned to her by Sachiko: choosing someone as a petite soeur! Will she be able to handle the pressure of such a monumental decision, or will Yumi crumble under the weight of the Council’s — and Sachiko’s — expectations? 
 
(Source: Maiden Japan)

The third season of Maria-sama ga Miteru. 
 
Summer has arrived at last, and with it comes the promise of summer break for the students of Lillian Girls’ Academy. Sachiko and Yumi retreat to the summer home of the Ogasawara family for a season of rest and relaxation, but their rosy trip soon sours when some old friends of Sachiko’s unexpectedly drop in. These wealthy snobs turn up their noses at Yumi and Sachiko’s relationship — and if Yumi isn’t careful, her blissful summer at Sachiko’s side could come to an abrupt and tearful end. 
 
(Source: Maiden Japan)

A series of specials included on the Maria-sama ga Miteru DVD releases.

Maria-sama ga Miteru's story revolves around the students of the Lillian Catholic school for girls, and can be considered character-driven, focusing on interactions between the characters rather than any sort of ongoing plot or goal to attain. At Lillian Girls' School, there is a tradition known as the sœur system (sœur being French for "sister" ) , in which a second, or third-year student, the grande sœur ("big sister" ) , will give her rosary to a junior student, the petite sœur ("little sister" ) , and promise to look after them and guide them.
 
When the story begins, Yumi Fukuzawa, a new first-year student admitted to Lillian, is praying in front of the Virgin Mary statue near the school entrance when she is suddenly approached by a cold second-year student named Sachiko Ogasawara who straightens Yumi's uniform ribbon. This seemingly simple act of kindness stays with Yumi the rest of the day, and she speaks of her meeting with Sachiko to her friends during class and lunch. After school is over, Yumi's classmate Tsutako Takeshima meets with Yumi to show her that she took a photograph of Yumi's meeting with Sachiko earlier that morning. Yumi asks if she can have the photo, but Tsutako says she will give her the snapshot under two conditions: one being that Tsutako can display it at the upcoming school festival, and two being that Yumi get Sachiko's permission to do so as well. Yumi agrees to this, which sets in motion a series of events involving the entire Yamayurikai — the student council of the school. A few weeks after first meeting Sachiko, Yumi accepts Sachiko's rosary and therefore agrees to become her petite sœur.
 
This officially inducts Yumi into the Yamayurikai where she assists them in school matters at the same level as the other two petite sœurs — Yoshino Shimazu, and Shimako Toudou — who are the petite sœurs of Rei Hasekura, and Sei Satou respectively. Through her activities in the Yamayurikai, Yumi becomes closer to the other members and generally finds her experiences with the group to be enjoyable.

Specials of Maria-sama ga Miteru: Haru released on the DVDs only.

A series of specials included on the Maria-sama ga Miteru 4th DVD releases.

A series of chibi-style "outtakes" from the "shooting" of the Mariamite series.

The setting is Lillian Academy, a private Catholic all-girls school where the student council is known as the Yamayurikai (Mountain Lily Council) and younger students are taken under the wing of older students through a system known as the "soeur system" ("soeur" is French for "sister"). The main character, Yumi, who is basically a nobody, suddenly finds herself interacting with the members of the Yamayurikai and their soeurs, most notably her crush, the talented, beautiful, and withdrawn Sachiko...
