Lottecia emerges as a key figure in the Urbanrama arc. A skilled swordmaster, she runs a dojo in Urbanrama where protagonists train. Her expertise places her at the heart of a conflict over the demonic blade Freak Diamond, coveted by rival factions; she actively protects this focal sword from adversaries.

Her background includes a past connection to Ed, a character with history involving the protagonist. Ed was once her instructor, but their relationship has soured into an active feud, fueled by Ed's pursuit of the sword she guards. Events surrounding her actions confirm Ed's identity and motives.

A critical turn happens when Lottecia vanishes during the night, taking a sword belonging to another character. This disappearance and theft escalate complications for the protagonist in Urbanrama and directly confirm suspicions about Ed's identity and intentions.

Simultaneously, the reappearance of other adversaries intensifies the situation, shifting focus to target a companion of the protagonist. The convergence of her disappearance with the stolen sword, the feud with Ed, and the return of hostile forces complicates the Urbanrama crisis.

Her role involves defending her dojo and protecting the contested Freak Diamond against mounting external pressures. The protagonist aids her efforts to safeguard the sword and resolve the conflict with Ed, linking her personal struggle to their broader journey. This collaboration occurs amid the protagonist's ongoing search for another character, tying her storyline directly into the central narrative within this arc.