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- "She's fine. She doing a good job controlling the first-years and stopping them from getting cocky from their fluke victory."
- ―Olga giving her opinion on Katyusha.
Olga (オルガ) is a secondary character from Girls und Panzer: Saga of Pravda.
Olga was a third year student and the former Vice-Commander of Pravda Girls High School Sensha-dō Team at the time of the 61st Sensha-dō Tournament, acting as the gunner of Ekaterina's IS-2. Her real name is Ruiko Aragusa (荒草涙子, Aragusa Ruiko).
Olga is a tall girl with boyish short hairs. She usually wears Pravda Girls High School's school uniform outside of matches and the sensha-dō one during matches.
Olga is Ekaterina's childhood friend, always acting kind and supportive of her friend's efforts and trying to keep her spirits high when she is upset.
Because she considers herself to be a mediocre Sensha-Dō practitioner, she instead focuses on keeping the team together and organized thanks to her strict nature and attention to detail. She acknowledges Katyusha's skill after seeing her performance in Pravda's training matches and confides to Ekaterina her positive opinion on the young first year.
Although she's shown more composed than her friend Ekaterina after losing a training match, much like her she takes the defeat at the 61st National Tournament pretty hard and breaks down crying after the loss.
After the third years suffer a humiliating defeat against the first year team commanded by Katyusha during their very first training session, Olga is shown trying to calm down an irritate Ekaterina, reassuring about her commanding skills and urged her to take actions after their defeat so it won't affect discipline. During the private review of the training session between the third years and Katyusha, she mostly acted as a mediator calming Polina burst of anger and make a summary of Katyusha's actions during the training, after they deduce that the first years won by chance she reminded Katyusha that the rules and regulations of Sensha-dō are there to protect the students and that "accidents" like not controling the crew could result in more than injuries.
After months of training in preparation for the 61st National High School Sensha-dō Tournament, she observed Katyusha and aknowledging to Olga in private that the young student is showing more promise than some of their second years.
Pravda's Sensha-Dō team then faced against St. Gloriana Girls College in the semi-finals of the tournament. Despite Ekaterina's attempts to keep her team under control, the hit and run tactics employed by Earl Grey began pushing on her team's nerves affecting their performance, Olga is seen somewhat panicking asking her friend advices. When everyone including herself were baited to attack a group of charging Crusaders led by Earl Grey and her Cromwell, which created a breach in her defense and gave Darjeeling's Churchill hidden in the forest a clear shot on the IS-2. After a foiled attempt by Katyusha to protect the flag tank, Assam was able to deliver a devastating through the turret ring that took out the IS-2 and ended the match. In the aftermath of the match, she was seen inside the IS-2 devastated crying with Ekaterina at their elimination from the tournament.
After the tournament she graduated leaving her post to Lisa, but she continues alongside Ekaterina to keep an eye on the first years, they discussed about Pravda future, Olga thinking that Natalia's technique to deepening friendship among teammates isn't the better way to go and predict a conflict with the hell-bent on victory first years. In the end as an alumnae she can't interfere with the Sensha-dō anymore and ask Ekaterina why she didn't warn the second years about Katyusha's scheming personality, she answered by reminding her how annoying it was when they were second years when third years constantely interfering.
- Main article: Olga/Gallery
|Ooarai Girls High School||Anglerfish Team||Miho Nishizumi ♦ Saori Takebe ♦ Hana Isuzu ♦ Yukari Akiyama ♦ Mako Reizei|
|Duck Team||Noriko Isobe ♦ Taeko Kondou ♦ Shinobu Kawanishi ♦ Akebi Sasaki|
|Hippo Team||Erwin ♦ Caesar ♦ Saemonza ♦ Oryou|
|Rabbit Team||Azusa Sawa ♦ Aya Oono ♦ Ayumi Yamagou ♦ Yuuki Utsugi ♦ Karina Sakaguchi ♦ Saki Maruyama|
|Turtle Team||Anzu Kadotani ♦ Momo Kawashima ♦ Yuzu Koyama|
|Mallard Team||Midoriko Sono ♦ Moyoko Gotou ♦ Nozomi Konparu|
|Leopon Team||Reira Nakajima ♦ Keiko Hoshino ♦ Maria Suzuki ♦ Tsuchiya|
|Anteater Team||Nekota ♦ Momoga ♦ Piyotan|
|Shark Team||Ogin ♦ Murakami ♦ Cutlass ♦ Flint ♦ Rum|
|Miscellanous||Taiga Ou ♦ Sadoka ♦ Mazoe|
|St. Gloriana Girls High School||Darjeeling ♦ Orange Pekoe ♦ Assam ♦ Rosehip ♦ Rukuriri ♦ Nilgiri ♦ Vanilla ♦ Cranberry ♦ Earl Grey|
|Saunders Girls High School||Kay ♦ Alisa ♦ Naomi ♦ Helmet-Chan|
|Anzio Girls High School||Anchovy ♦ Carpaccio ♦ Pepperoni ♦ Amaretto ♦ Gelato ♦ Panettone|
|Pravda Girls High School||Katyusha ♦ Nonna ♦ Klara ♦ Nina ♦ Alina ♦ Ekaterina ♦ Olga ♦ Polina ♦ Natalia ♦ Lisa ♦ Mo ♦ Zemlya ♦ Neba|
|Kuromorimine Girls High School||Maho Nishizumi ♦ Erika Itsumi ♦ Koume Akaboshi ♦ Leila Rou ♦ Emi Kojima ♦ Geshiko ♦ Sangou ♦ Mauko ♦ Sheska ♦ Manami Himuro ♦ Runa Onizuka ♦ Kirishima|
|Chi-Ha-Tan Academy||Kinuyo Nishi ♦ Haru Fukuda ♦ Tamaki Tamada ♦ Shizuko Hosomi ♦ Setsuko Nagura ♦ Noriyo Hamada ♦ Tomiko Teramoto ♦ Emi Ikeda ♦ Rin Kubota ♦ Yasuko Nishihara ♦ Chiyoko Uenishi ♦ Tatsu Hasegawa ♦ Hanako Hirai|
|Jatkosota High School||Mika ♦ Aki ♦ Mikko ♦ Touko ♦ Lili|
|BC Freedom High School||Ribbon Warrior||Asparagus ♦ Moule ♦ Bordeaux|
|Das Finale||Marie ♦ Andou ♦ Oshida ♦ Sofue ♦ Isabe|
|Blue Division High School||El ♦ Tristana ♦ Viridiana ♦ Andalusia|
|Koala Forest High School||Wallaby ♦ Platypus|
|Bonple High School||Ribbon Warrior||Jajka ♦ Uszka ♦ Pierogi|
|Maginot Girls College||Éclair ♦ Fondue ♦ Galette ♦ Madeleine ♦ Colombier|
|Count High School||Noemi Kohiyama ♦ Anna Masukura ♦ Nachigami Sisters ♦ Marina Constantinescu ♦ Mizuki Ikarashi|
|Tatenashi Girls High School||Shizuka Tsuruki ♦ Rin Matsukaze ♦ Haruka Endou|
|Tategoto High School||Aung|
|Maple High School||Trout ♦ Amber ♦ Oleo|
|Kebab High School||Bosphorus|
|Bellwall Academy||Tiger I Crew||Emi Nakasuga ♦ Hitomi Yuzumoto ♦ Kita ♦ Takami ♦ Nagisa Shiratori|
|Jagdpanther Crew||Neko Yamamori ♦ Yano ♦ Koharu Sakai ♦ Kanbara ♦ Hirono|
|Elefant Crew||Chifuyu Doi ♦ Terauchi ♦ Wakasugi ♦ Kunihiro ♦ Nogata ♦ Enami|
|T-44 Crew||Youko Minami ♦ Saionji ♦ Azuma ♦ Hokuto|
|Panzer II Crew||Kashiwaba Sisters|
|West Kureouji Grona Academy||Kiri Shiratori|
|All-Stars University Team||Alice Shimada ♦ Azumi ♦ Megumi ♦ Rumi|
|Japan Sensha-dō Federation||Ami Chōno ♦ Shiho Nishizumi ♦ Renta Tsuji ♦ Chiyo Shimada ♦ Shichiro Kodama ♦ Kikuyo Idegami ♦ Kanon Sasagawa ♦ Hibiki Inatomi ♦ Remi Takashima|
|Non-Affiliated||Yoshiko Akiyama ♦ Jungorou Akiyama ♦ Hisako Reizei ♦ Shinzaburo ♦ Yuri Isuzu ♦ Chihiro Yusa ♦ Boko|