Mikko appears as a supporting character first introduced in the cinematic sequel to the *Girls und Panzer* television series, with follow-up appearances in later franchise installments. She attends Jatkosota High School and serves as the driver for the school's sensha-dō team, expertly handling their modified Finnish BT-42 assault gun featuring Christie suspension.
Her physical presentation includes average height, reddish-brown hair typically styled in two small side braids, pronounced bangs, and brown eyes. She consistently wears her school's distinctive sensha-dō uniform: light blue trousers with grey vertical stripes rolled up beneath her skirt, paired with large winter boots and thick socks, reflecting her practical role.
Mikko exhibits a hot-blooded, energetic personality, often marked by a mischievous grin. She possesses exceptional technical skill in vehicle operation, demonstrated through unconventional driving tactics during combat. Occasional references note her notable appetite.
In her cinematic debut, Mikko joins teammates Mika and Aki in the BT-42 during the Ooarai-led team's match against the University All-Stars. Her actions prove strategically vital, assisting allied Hetzer, CV.33, and Type 89B tanks in eliminating the Karl-Gerät mortar. She achieves this by distracting the massive vehicle and disabling its three M26 Pershing escorts through audacious maneuvers:
* Executing a high-speed jump onto a river island to ambush Pershings
* Driving beneath collapsing bridge debris
* Switching control systems to maintain movement on road wheels after track damage
* Conducting a one-wheeled charge to eliminate a Pershing at point-blank range
Her driving prowess is further showcased in later matches. Responding to Mika's unusual "warp backwards" order during a first-round engagement, she collides with an enemy tank, balances on one wheel, rushes past multiple opponents, executes a sharp U-turn, and eliminates the opposing flag tank just before time expires. This highlights her intuitive grasp of unconventional tactics and deep mechanical understanding of the BT-42's suspension.
Background details beyond her school affiliation and combat role remain sparse. She maintains a consistent association with teammates Mika and Aki, both in tank operations and non-combat scenarios like piloting a boat. Unlike her teammates, she wears her sensha-dō jersey continuously instead of changing into the standard school uniform.
Her birthday falls on November 22, a date historically linked to a Finnish-German transit agreement. Cultural analysis suggests her character design may draw inspiration from Little My of the Finnish Moomins series, aligning with Jatkosota's Finnish thematic connections. An anecdote references her hearing about Pravda High School "kindly lending" their KV-1 tank to Jatkosota, though contextual reactions imply this transfer might not have been entirely voluntary.