Coconna began as an orphan with a singing background, joining Chirico Cuvie, Vanilla Vartla, and Bouleuse Gotho in Uoodo. Initially romantically interested in Chirico, her involvement created a Love Triangle with Fyana that shifted over time.

She proved a highly capable driver, maintaining composure and effectiveness while operating vehicles amidst heavy combat. This skill featured in the original series and the "Big Battle" OVA, where she undertook missions involving theft attempts and clashes with military forces. Her early dynamic with Vanilla Vartla involved persistent Belligerent Sexual Tension, which ultimately resolved into marriage and the raising of six children.

During "Phantom Arc," Coconna's marriage to Vanilla faced strain. Marking their 25th anniversary through a gesture arranged by Gotho and Vanilla, she journeyed to locations tied to their shared past with Chirico. This trip prompted reflection on past hardships and adventures, leading her into an ancient prophecy concerning Chirico's legacy. Her interactions and recollections throughout this OVA highlighted enduring bonds with former comrades and a lingering hope to reunite with Chirico.

As the primary female presence within the core group of male companions, her narrative trajectory concluded with an established family life alongside Vanilla, signifying a transition from earlier romantic pursuits and high-risk escapades.