- "Look closely and suck on your thumb while I slaughter these sacrificial lambs of yours... Chibi."
- ―Jajka taunting Katyusha before the Tankathlon match
- "Bonple's Jajka... Hm. Nonna wasn't that the chick you've beaten up so violently ?"
- ―Katyusha about the fate that Nonna reserved to Bonple
- "Come at us whenever you want! We'll take you on! No matter when, no matter where, and no matter who!"
- ―Jajka during her villainous breakdown after beating Pravda
Jajka is the overall commander from Bonple High School. She operates a Polish 7TPjw. She is also known by the title of Grandmaster or the Queen of Tankathlon.
Jajka is a medium sized girl with long blonde hair and a pair of green eyes. She wears her blond hair in a long braid originating as a swirled bun. Jajka is oftenly seen wearing the Bonple High School Sensha-do uniform (with ornaments due to her rank) and sometimes she's seen with the school uniform. She's also seen (only in mental representation of herself) dressed as a Winged Hussar.
She is first seen as a calm and charming lady although being a little arrogant. She later reveals to be condescending, sour, eager of revenge (especially since their humiliating defeat while facing Pravda) and extremely ruthless. She is then driven mad by her victory against Pravda challenging everyone to beat her. But she also appears to be highly skilled as she manages to defeat a team that fielded more than thirty tanks (not without suffuring losses) with eight tanks and two tankettes.
Little is known about Jajka before Ribbon Warrior except that she commands everything that touch more or less to tanks in Bonple, that she suffered an humiliating defeat facing Pradva during the first round of the 63rd Sensha-Do Tournament (she will retain a great bitterness from this defeat and an immeasurable hatred toward Pravda) and that she managed to build a name for herself in Tankathlon by winning the Tankatlon last season tournament and earning the nickname "Queen of Tankathlon" so far that she has better consideration toward Tankathlon that Sensha-do.
She joins Tankathlon actual season after learning that Anzio will be part of it. She later assists a match, that opposed Anzio to Tatenashi High School's Centipede, due to Anchovy bringing more and more tankettes in the fight she feels obliged to interrupt the match that she considers "weak" by shooting at Anchovy's CV.33. After a failure of Pepperoni to attack Jajka's tank she taunts everyone about the true valors of Tankathlon.
The beginneer school of Tategoto allied with Anzio will be annihilated by Bonple due to Tategoto's inexperience and Anzio's lack of firepower and awareness. And then she's seen on Bonple's carrier preparing żur to celebrate their next match against Pravda (under the name of Katuysha's Volunteer's Army). Finally her revenge is within range.
She's seen violently taunting Katyusha before the beginning of the match. She fielded eight 7TPjw and two TKS 20mm tankettes during against sixteen T-70. Against KVA she used mostly ambush tactics and traps, however this is not enough and her team suffer some loss. This getting hard for Bonple when Katyusha called a second echelon of sixteen tanks to perform a double envelopment. Jajka and three other tank camouflage in the snow letting Uzska as a bait to lure the main force away from the flag tank. Once the tanks passed she and her remaining tanks charged Nina's tank and shot her down winning the match. After the match Jajka burst out laughing and challenged anyone to defeat her in Tankathlon.
- Jajka means Eggs in Polish.
- Jajka's distinctive uniform is based off the gala-dress uniforms of the Polish Podhale Rifles Brigade.
- During the charge and after taking down Nina's tank, she's represented charging and partially dressed as a Winged Hussars (although I don't think they wore pleated skirts). Winged Hussars is name that Polish Cavalry wore during the 16th and 18th century due to armored wings on the back of their armor. The Winged Hussar also inspired the badge of the Polish Army's 1st Armoured Division.
- Just before their tankathlon match against Pravda she is seen cooking żur (or żurek). Which is a Polish-Belarusian soup made of soured fye flour and meat. Like represented in the manga the soup can be served in a bowl made of bread.