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Description
Habolg, known earlier as Hablog and affectionately called "Uncle Habo" or "Habo-san" by Riko and other Belchero Orphanage children, is a prominent Black Whistle delver in Orth. He is married to Laffi, who operates a shop. He acts as a mentor to the orphans.

Tall, bulky, and rough in appearance with dark gray eyes and a full beard, Habolg wears a distinctive wide-brim hat fitted with a lamp, a brown coat, darker brown shirt, and gloves, differing from standard delver gear. His large build contrasts with his exceptional agility.

He possesses a bright, kind, curious, and openly friendly personality, earning respect within Orth. He readily shares Abyss knowledge with the orphans while withholding state secrets about White Whistles. Habolg exhibits strong leadership, managing large expeditions like a joint delving project on the 2nd Layer where he served as General Leader. During this mission, he investigated a pentagonal hole filled with Second Grade Artifacts, speculating about its connection to the fairy tale "The Song of Hariyomari" and requesting Ozen's analysis.

His background includes delivering Lyza's White Whistle and final notes to the surface. When Riko and Reg fled the orphanage, Habolg tracked them on the 1st Layer using augmented speed beyond normal human limits. Instead of forcing their return, he offered supplies, medicine for Tachikiri Fever, and a warning about Ozen. He later recounted stories to Nat and Shiggy on the surface, hinting at deeper Abyss dangers.

Habolg aspires to become a White Whistle, requiring a descent to the 5th Layer, and acknowledges the typical need for unauthorized travel to achieve this rank. Beyond the main narrative, he mentors newer delvers, assigning quests like ecological surveys or poison sample gathering. He demonstrates trust in their abilities, recommending one for Black Whistle promotion after comparing their potential to Lyza and Torka. His letters to Laffi, mentioning relic discoveries and cravings for her stew, reveal his dedication to providing her a better life upon achieving White Whistle status.

His expertise covers extensive knowledge of the Abyss's layout, relics, and White Whistles, alongside practical survival advice such as knowing when to retreat. His role includes minor community interactions, like relaying shop anniversary information or discussing limited-edition sales with other delvers.