He had joined. In The King's Avatar chapter 1541,"The Sixth Man," Blue River accepted Ye Xiu's invitation and officially transferred to Happy, becoming a member of Team Happy. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!

Blue River didn't join Happy. Blue River was a character in Butterfly Blue's eSports novel, The King's Avatar, and its derivative works. He was the former captain of Team Excellent Era, but later announced his retirement and joined Happy for personal development reasons. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Blue River had joined Happy in the novel The King's Avatar, chapter 1075. In the novel, Team Happy had defeated Team Wind Howl 4:1 in the Challenger League, successfully obtaining a ticket to next season. After the Challenger League ended, Blue River sent a request to Team Happy, and Team Happy agreed to Blue River's request. Blue River's addition brought more experience and strength to Team Happy, as well as new opportunities for his own career. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Blue River didn't join Team Happy. According to the information in The King's Avatar, Blue River, as a member of Blue Brook Guild, hadn't been invited by Ye Xiu to join Guild Happy. As a result, Blue River didn't join Team Happy. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Yes, in the novel "Full Time Expert," Blue River joined Team Happy in Season 10 of the Glory Professional Alliance. While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
Blue River hadn't officially joined Guild Happy in The King's Avatar, but in the early days of Guild Happy's establishment, he had used the undercover account "Gorgeous" to infiltrate the guild. After being exposed, he had been persuaded by Ye Xiu to help manage Guild Happy for a period of time. However, he only acted as a consultant and did not actually participate in the management of the guild. Later, Wu Chen joined Guild Happy and took over Blue River's management. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
In The King's Avatar, Blue River joined Happy in the middle of Glory's tenth season. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Blue River joined Happy. Blue River was Blue Bridge Spring Snow's alt account sent by Blue Brook Guild to clear the tenth server. He joined Happy and became Happy's nanny and assistant. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Blue River joined Happy in chapter 1150 of the novel [Full Time Expert]. While waiting for the anime, you can also click on the link below to read the classic original work of " Full-time Expert "!
The exact time Blue River joined Happy wasn't mentioned in the search results. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
Blue River didn't join Happy. Blue River rejected Ye Xiu's invitation and said that he was a member of Blue Brook Guild. Even though Guild Happy had wanted to invite Blue River to join when it was first established, he ultimately didn't join Happy. As a result, Blue River didn't join Guild Happy. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!