Middle-school student Riku Mikami, with his best friend Yukio Hidaka and their classmate Momoka Yashiro are all dragged into this massive new world. Inside GNB, they become Divers. There, they meet Sara, a girl who has a mysterious power that works with the Gunpla. They decide to team up with her but…

Kyouya Kujou is a famous Diver who is one of the champions that Riku looks up to. A few Divers create a system corps known as “Force.” They work to block players known as “Mass Divers” who use illegal tools and the break decals.

As they encounter many others and have more experiences, Riku and friends are not just building in Gunpla, but rather they are building their own adventure!

Riku Mikami

Voice Actor: Yuusuke Kobayashi

Riku is a 14-year-old boy who attends middle school in Rinkai City. He has excellent reflexes and has the inherent ability to flawlessly adapt to using anything. However, on the flipside, he’s looking for something that can stoke the fires of passion within. He personally sees Kyouya Kujou as his rival in Gunpla and looking for something to stimulate him, he decides to jump into the world of GBN.

Momoka Yashiro

Voice Actor: Nene Hieda

Momoka is another classmate of Riku and Yukio’s. She belongs to the girls soccer team and has an extremely overwhelming personality. She was trying to persuade Riku to join the soccer team when at some point, she realized how much fun GBN was and decided to play with Riku and Yukio. She is equipped is a serious little girl-esque belief that that which is just, is cute.

Kyouya Kujou

Voice Actor: Jun Kasama

Kyouya is the strongest diver in GBN and holds the title of champion. He gives off a gentlemanlike and warm impression, but when he is in Gunpla Battles, he has a hidden passion that burns more wildly than anyone else. Riku looks up to him and aims to become like him.

Yukio Hidaka

Voice Actor: Fujiwara Natsumi

Yukio is Riku’s classmate and best friend. He loves gundam anime greatly and his knowledge of it rivals that of adult fans. He tends to be a rather plain boy, but he definitely has the technological strength when it comes to Gundam Builder. Riku views him as a reliable diver in GBN.

Sara

Voice Actor: Haruka Terui

Sara is a girl that Riku and his friends meet in GBN. She has an unusual sense for understanding the special feelings put into Gunpla that only experienced builders know.

Ronmaru

Voice Actor: Shou Hayami

Ronmaru is an influential person who commands the Seventh Panzer Division known as ‘Force.’ He’s a master of battle tactics to the point that everyone refers to him as the ‘resourceful general.’ He loves extremely difficult battles, but does a complete 180 when he is a diver as he is very pretty in that form. He’s an excellent rival to Kyouya as well as a good friend.