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Atri is a childhood friend of Prince Zen and was a young archer at Wistal Castle. He is part of a group of Lido rebels that went into hiding after Prince Izana overthrew the lords of Lido and Sui following his 17th birthday. His goal was to become friendly with Zen in order to lure out Izana so that the Lido rebels could exact revenge.
Atri has mid-length, dirty-blonde hair which is kept in a high ponytail with bangs. He has thick eyebrows and pointed eyelashes. He wears a brown short-sleeved jacket and a dark-grey, long sleeved top underneath. He also wears plain white trousers with an apron attached to the back. He has even described himself as "having a pretty face."
His fake personality towards Zen was cheerful and friendly. He used to argue with him and play fight. They joked around whenever they met and he used to listen to Zen’s problems. After he was confronted by Zen his personality changed. It was bitter and vengeful. He held a grudge for the Royal family as he says that Zen 'has the things that he doesn't' because of it. Typically it could be seen as jealousy.
Atri was Zen's best friend. Zen often used to sneak out to meet up with him while he was working during the day. After some time he was moved to a night job, which was most likely Izana's way to stop Zen meeting with him secretly, but he still asked Zen to meet up with him now and again. One day a group of traitors, like himself, found Atri and wounded him severely. After Zen found him and was knocked out, Atri demanded that he was to be taken seriously and for them to kill Zen. Mitsuhide intervened and confronted the group. Izana also turned up and Atri mentioned that he was already found out so it was 'too late'. He then went on to separately fight Zen. He shot an arrow directly at Zen, which he blocked, and soon after Atri was slashed by Mitsuhide. When Zen rushed to him Atri asked why he was making such a face and that their friendship probably would have been better if he wasn't a prince. He shortly passed away after that.
- "From the moment I met you, I realised what a laughable pair we make." —To Zen.
- "If you weren't a prince, it probably would have been... better..." —Atri last words to Zen