- Name: Luka Mercuito
- Age: 165 (physically 16-17)
- Hair: Blonde
- Eyes: Blue
- Family: Father (deceased), Paradigm
Luka is a beautiful, blonde elf with blue eyes and pointed ears, who looks like a teenage girl despite her age. She wears a short skirted green robe-like dress, with long sleeves, long brown leggings that reach to her upper thighs, and thigh high brown boots with green ankle bands and straps. She also has a red band around her neck, the only keepsake from her father.
Luka is a cheerful girl though somewhat reserved and prone to panicking in dangerous situations. Though that changes when Rouhan helps her through to help her see how brave and strong she can be to others. Afterwards, she becomes a fierce archer and swordsman, on par with Mia, whom she sees as a rival for Rouhan’s affections. Before that, she showed signs of a psychotic break after her rescue from the ruined village in Kohan Forest, refusing to accept that her father died at the hands of the Red Dragon, Ragnrok, until it was finally killed. Before though, she always had a second plate made out, or had male clothing ready, believing that her father would come to Ereboria to take her home again.
The realization of her father’s death shook her to the core, crying endlessly, as she cried out she had no reason to even continue living. However, Rouhan stated that she did: just to live for her father.
Luka became more "bold" in her relationship with Rouhan when the other girls start being intimate and dislikes the idea of being left out. Luka thinks of Rouhan very highly, and wants to stay with him forever. However, she will pinch his cheek whenever he lusts over other girls and despite being shy, she will beat or slap someone like the demon lord, Didoria, when they insult Rouhan.
During a peaceful slumber, Luka has a proclivity of sleeping naked.
- Archery: Although her people are peaceful, her father prepared her to fight when it was necessary. She is a natural with a bow and arrow.
- Swordsmanship: Lately, she has asked Rouhan for sword lessons, and practices with him and Seiji teaching Goblin underlings.