A 17-year-old high school student living in a seaside town. He has a long history as a GBN Diver, and his skills as both a builder and a fighter are top-tier. Recently, however, he has been playing as a mercenary while wandering through the Dimensions of GBN in search of someone he once lost. Gunpla used: Core Gundam Earthree / Marsfour / Veetwo / Mercuone / Jupitive.

A mysterious Diver who is blunt in speech and attitude, showing little emotional fluctuation and keeping communication to the bare minimum. She has a strangely honest side, taking others' words at face value, which reveals a kind of innocence behind her cold exterior. When Hiroto sobbed over the circumstances of Eve's disappearance and his mistakes in the Second Coalition of Volunteers Battle, she kissed away his tears and held him, encouraging him to cry. She has also expressed gratitude that she was born because of the choice made by Hiroto and Eve. She calls Sarah "Big Sister," and while they have a good relationship, she treats her with great respect. Gunpla used: Wodom Pod + Mobile Doll May.

Perhaps due to her purity, she occasionally makes sharp-tongued remarks. Because she rarely accessed the game, her Diver Rank remained at "F," preventing her from forming a Force, which led her to call Koichi Nanase a "useless person," greatly depressing him. Now wearing a new blue scarf around her arm, she has a more mature atmosphere and is sometimes called a "young bride"—though it goes without saying whose bride she is. Gunpla used: Mobile Doll Sarah.

In real life, he often wears hoodies. His avatar, which closely resembles himself, features blue-themed clothing and a dagger tucked into his chest plate. He spoke of a "unfinished battle" as if he knew beforehand, but in the story, he was informed by May after the fight and received an apology from Hiroto. They shared their feelings and ultimately promised a rematch with smiles. Gunpla used: 00 Sky.

An androgynous Diver who still looks quite young. Nicknamed Pal. He is a character packed with traits: tanned skin, hair covering his eyes, fox ears, a fluffy tail, a graceful physique, and oversized clothes. His Gunpla is the Ex Valkylander.

Riku and Momoka's classmate and best friend, recognizable by his round glasses. His Diver name is his nickname, Yukky. He prefers warm orange colors for his clothing, but his pajamas are a T-shirt and half-pants. Gunpla used: Jegan Blast Master.

A famous streaming Diver on the video service G-Tube. An upbeat Diver who admires Captain Zeon and wanders through various parties aiming to be a hero. However, he is poor at cooperation and his battle record is nothing to brag about, but he enjoys GBN with his natural lightheartedness. Gunpla used: Gundam Aegis Knight.

A veteran Diver of GBN, though she strongly dislikes being called that. She opened her own shop within GBN, which serves as a place for information exchange for beginners and experts alike. She seems to have a special relationship with May. Gunpla used: Gundam Love Phantom.

A man with a past of developing and spreading the unofficial Break Decals, attempting to bring about the collapse of GBN. He has since reformed and works with his best friend Koichi at the EL Birth Center, a registration facility for EL-Divers. He still uses a Haro Diver avatar. His Diver name is Anshu. Gunpla used: Gundam Astray No-Name.

The older brother of Nanami, a clerk at "THE GUNDAM BASE," and a former Gunpla builder. A young man with glasses, sleepy-looking eyes, and messy black hair. In GBN, he goes by KO-1 and uses an elf-eared avatar with white hair that resembles himself. Riku Mikami and his friends, who learned about him through his sister, invited him to join their Force, but he initially refused due to past experiences. However, meeting Sarah in GBN led him to meet Shahryar, Tigerwolf, and Maggie, and he became interested in Riku and the others whom they were watching. His Gunpla is the Galbaldy Rebake, a customized version of the Galbaldy β he used during the GPD era.