The following is NOT canonized by the TTV. Anything listed serves as potential material for the TTV, if they ever want to use any of it. Anything they reject outright (assuming any of them read this) will be labeled Non-Canon.
Additionally, the following characters are from @Gresh113’s Matoran Ideas thread, with all images by @Noupix. This thread is to help organize the Matoran into their regions, as well as track who would interact with whom.
Garan: Tiroan Temple Guard captain.
Gar: Tiroan Temple Guard; son of Garan.
Runa (@Noupix original): Tiroan Temple Guard; mother of Nuparu; friend of Garan.
Nuparu: exiled Tiroan engineer/inventor/tinker; daughter of Runa.
Mavrah: mad scientist.
Taipu: farmhand for Korgot, Reysa, and Kaj; gullible and noble.
Stringer (Hero Factory): traveling musician.