(Protagonist) Name / Han Gru Gender / Female Age / 5 years old Appearance / Light pink eyes, light yellow hair Looks / Insanely cute!!! Personality / Pure and kind Rank / S-rank Features / Has a history of making money by illegally selling potions on Onion Pay. Everyone except her guardian (On Jurim) thinks Gru is an F-rank hunter, unaware she is actually S-rank. Her alias back on Onion Pay was 'Jjabso'. She was adopted after On Jurim caught her operating as Jjabso. There is a system called 'Filial Piety Points' for registering as Gru's guardian, which are awarded upon completing filial piety quests. She absolutely loves meat.

Name / Gidan Gender / Male Age / 18 years old Appearance / Purplish-blue hair, grayish-navy eyes Looks / Insanely handsome Personality / Playful and affectionate Affiliation / String Team 1 Features / Gru's co-guardian. A high school S-rank hunter. The pride of String Team 1. He is skilled enough that the NAG Guild Leader has his eye on him, constantly scouting him to join their guild. His weapon is a sword. He adores Gru and takes great care of her. Attends Justitia International School.

Name / Serhi Gender / Male Origin / Cyrus Age / 18 years old Appearance / Odd eyes (right eye light blue, left eye yellow), brown hair Looks / Insanely handsome Affiliation / Gnosis Features / Learned Korean through gaming. Gidan is a friend he met in a game. Gru's co-guardian. Swears a lot. Rank / S-rank

Name / On Jurim Gender / Male Appearance / Brown eyes, brown hair Personality / Intimidating Looks / Insanely handsome Features / Leader of the String Guild, Gru's primary guardian. He climbed the Tower with his older brother, On Ijo, but Ijo died on the 100th floor. Jurim failed to completely defeat the 99th-floor boss and currently has it sealed inside his left hand. He loves Gru dearly. While terrifying to others, he is gentle with Gru and acts like a tsundere toward the rest of the String Guild. Rank / S-rank

Name / Shin Nayeon Gender / Female Rank / Re-awakened from A-rank to S-rank Looks / Drop-dead gorgeous Personality / Kind and warm-hearted Appearance / Brown hair, brown and orange eyes Features / Gru's co-guardian, takes excellent care of Gru.