Glass

"Are you all so threatened by these little monsters? It seems there is but one true hero among you."

- Glass taunting the Four Heroes

Glass is a major character in The Rising of the Shield Hero, but she started as an antagonist of the series. She made her debut in Volume 3 as a minor but pivotal antagonist, before she returned and became the main antagonist of Volume 5. In the anime series adaptation, Glass makes her debut in Episode 10 and later serves as the main antagonist in the last quarter of the series.

Originated from a race of spirit people in another world, she was later revealed to be a Vassal Wielder known as the Fan Hero. She became a supporting characters in the rest of series.

She is voiced by Megumi Han in Japanese version and by Morgan Berry in English version.

Personality
Stoic, cold, serious and stern, Glass is a person who holds strong loyalty to her world and, as a hero, holds high expectations of her fellow heroes, even when she is at odds with them. She is serious in her mission and doesn't like laying back of her friends. In her first full appearance, she shows disdain over Ren, Motoyasu and Itsuki for being weak, especially in the Light Novels where she actually doesn't believe they are heroes, even calling them as servants of the Shield Hero, agitating all of them.

That said the event which made her question Naofumi's integrity is an event of him stepping on Malty Melromarc's head. She was willing to murder the heroes of Melromarc's world to save her own. However, during her fight with Naofumi, Glass shows interest and respect, regarding him as the only real hero of Melromarc in her eyes and giving him various praises.

In the web novel, where Naofumi defeated her, she even asked him for his name after her defeat, introducing herself in return. In the Light Novel, manga and anime, Glass and Naofumi intruduce themselves to each other during their first encounter. In short, she has a warrior's sense of pride and respect for a worthy opponent like Naofumi.

Later in the series, after becoming Naofumi's companion, her serious expression is changed when she is around Kizuna to a more friendly and joyful expression. Naofumi considered weird for someone who always has a calm and cool expression with such expressions.