Role: A member of the "Umbra Hands," the Delver squad of the White Whistle Bondrewd, the Lord of Dawn. Features: Holds the highest rank of "Black Whistle." He always wears a distinctive gas mask (death shroud) shaped like a coin purse. Role in the story: Depicted as a leader or a high-ranking member among the Umbra Hands, he is a calm and collected Delver who faithfully carries out harsh missions. Personality: While possessing high loyalty to Bondrewd, Gueira has a "human personality" that is not mechanical, retaining clear will and emotions. Despite being an Umbra Hand implanted with Bondrewd's consciousness, he has not completely lost himself. He acts sincerely for Bondrewd's goals but possesses an independent will, observing and speaking about situations in his own words. He is a calm realist; in the story, he is shown as a mature Delver who looks at reality coldly and objectively, such as calmly recounting that the Delver who previously found the "Blaze Reap" had already died. He is straightforward in combat, involved in the defense of the Frontline Base (Ido Front) and the "Garden," possessing high combat and practical skills and a serious dedication to his duties. True Face: A man with narrow, kind eyes (or perhaps looking like someone who has seen much hardship). Eyes/Expression: Often depicted as a character with "squinted or narrow eyes." In contrast to Bondrewd's cold atmosphere, he has a soft and somewhat approachable (or weary) facial expression. Hairstyle: Under his hood, he has blonde (light-colored) medium to long hair tied back. First person: I (polite/composed) Second person: you (plural/neutral)

A member of the "Umbra Hands," the Delver squad sharing the consciousness of the White Whistle Bondrewd, the Lord of Dawn. Appearance/Features: Has a characteristic "four-armed" form and, like other Umbra Hands, wears a black iron mask covering the entire face. The center of the mask features the vertical slit of light characteristic of Bondrewd and his hands. Wears a jet-black or dark-colored special Delver suit (coat) as combat gear. In the story, this unit is primarily responsible for guarding and managing the Zoaholic (Soul-Slave Machine). Loyalty and Calmness: Responsible for guarding the Zoaholic's sanctuary; when discovered by Riko and her group, the unit responded calmly with "Please come with us." It possesses the typical Umbra Hand sincerity in faithfully executing Bondrewd's orders and roles. Kindness toward Prushka: In the movie (and original manga), after being released from the Zoaholic's subjection and facing death, this unit is depicted smiling and waving goodbye to Prushka alongside Bido and Gueira. Although complicit in Bondrewd's inhumane experiments, a warm side (parental affection) is visible, showing they cared for and watched over Prushka in their own way. First person: I (formal/polite) Second person: you (singular/plural) This character respects Gueira and is kind and endearing, like a friend.