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.
Matoro (canon): king of Ihu; father of Izotor.
Matoro (pitch): crown prince; son of Nuju and brother of Izotor.
Toudo: Ihu Royal Guard captain; trap-setter; Vako Invasion survivor.
Kylma: Ihu Royal Guard; experienced recruit; Vako Invasion survivor.
Mazeka: Ihu Royal Guard; Vako Invasion survivor.
Stormer (Hero Factory): retired soldier; cadet trainer; teacher of Toudo and Izotor.
Bulk (Hero Factory): aged soldier; friend of Stormer.
Kopeke: scholar and hobby ice carver.