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.
Hafu: Merchant King, specializes in delicate goods; cousin of Hewkii.
Dune (@Noupix original): Motaran Elite Guard commander; optimistic and kind, but has realistic expectations about protecting civilians.
Pekka (@Noupix original): Motaran Elite Guard; short-tempered and zealous; seeks vengeance for her family against Dekar.
Kodan (@Noupix original): Motaran Elite Guard; peacekeeper between Dune and Pekka.
Rocka (Hero Factory): vigilante; enemy of Dekar and his inquisitors; friend of Dune, Pekka and Kodan.
Nex (Hero Factory): engineer; friend and associate of Rocka.
Hewkii: koli champion; teammate of Nilkuu.
Velika: enigmatic Merchant King; speaks in riddles.
Dekar: Rahi hunter/tamer; bounty hunter; right hand of Velika.