In the recruitment arc, there are 3 idiots that resemble closely the school bullies in the beginning of the series.
New 3 Idiots (新３バカ?)
Voiced by: Ryosuke Kanemoto (Kōda), Ryohei Arai (Saotome), Yusuke Handa (Hinoe) A Trio of C-Class agents who were seemingly made to believe that Arashiyama Unit has no real strength. They're frequently trying to show off, but get constantly beaten up. According to Replica, they seem like idiots. The credits give them the surnames: Kōda (甲田), Saotome (早乙女), and Hinoe (丙) in the anime.
and right below lists the old 3 idiotslink:
3 Idiots (３バカ?)
Voiced by: Mitsuo Iwata (No. 1), Kōta Nemoto (No. 2) and Hiroaki Miura (No. 3) A trio of bullies from Osamu and Yūma's classroom. They bully Osamu and Yūma at first, but start fearing them after they find out Osamu is a Border agent and after Yūma scares them away.
Their seyuu are different, but the characters seem the same ones.
Are they the same?