Gobco Ngière, also spelled Gobuko Nggiell or Gobuko Ngière, is a hobgoblin whose life underwent profound transformation through her bond with human siblings Peter Grill and Lucy Grill. Abandoned as a child, she was found and raised by Peter and Lucy, becoming a cherished member of their family. This peaceful existence shattered when knights hunting goblins attacked, forcibly separating her from the Grills. Presumed dead by Peter and Lucy, she was instead taken in by other goblins.

Adapting to the harsh realities of goblin society forged her into a tough and closed-off individual. She eventually formed and led the "Hellish Three Stars" alongside fellow goblins. Her path shifted dramatically when Peter Grill was captured. Recognizing him, she facilitated his escape, triggering a resurgence of childhood memories. Exposure to the Goblin Queen's pheromones also created a physiological compulsion, leading to sexual activity with Peter to alleviate its effects.

Following this reunion and escape, she decisively rejected the goblin tribe to realign herself with Peter and Lucy, resulting in her expulsion from goblin society. Reintegrating into Peter's life placed her within his complex romantic entanglements, commonly termed his harem. Her driving force became a deep-seated yearning for familial connection and a profound desire to bear Peter's child to cement that bond.

Her personality softened significantly after rejoining Peter. The roughness developed during her goblin years faded, revealing an innately gentle, kind, and nurturing core. She embraced a warm, inclusive "big sister" role within the group dynamic, actively welcoming other members of Peter's harem and viewing them collectively as an extended family. Creating and maintaining this cohesive family unit became her defining purpose, reflecting a journey of displacement, adaptation, and an ultimate return to the human connections that defined her earliest sense of belonging.