RIVALS on Roblox is mainly associated with Nosniy as the creator, and one source also mentions Sensei, Neko, and Brian as devs in a “3 devs” RIVALS video, though that looks like a creator/community clip rather than an official full credits list.

What’s confirmed

  • Nosniy is directly identified as the dev behind the success of RIVALS.
  • A Roblox video title references Sensei, Neko, and Brian as “3 DEVS” in a RIVALS live session.

What’s not fully clear

  • I couldn’t verify a complete official developer roster from the available source.
  • So the safest answer is: Nosniy is the confirmed main dev, and Sensei/Neko/Brian are names publicly associated with the game, but not necessarily the full team.

Quick scoop

The best-supported public answer is that Nosniy is the main creator of RIVALS, with Sensei, Neko, and Brian also appearing in dev-related content.

TL;DR: Nosniy is the main confirmed dev name tied to RIVALS, and Sensei, Neko, Brian are other publicly linked names, but the full dev list isn’t confirmed here.