We’ve discussed this before, so I’ll just refer anyone interested in more in-depth arguments on the point to our more thorough discussion in the Regarding Hagah Masks post in the Ask Greg. But for the sake of those skimming this argument, I’ll post this.
- We only have one quote that ever expressly implies that Iruini is the only exception to the “different mask/powers” rule, and it’s a shaky quote that needs Greg’s further explanation. Anything in-canon just says the masks are in the shapes of prior heroes.
- Having four of the six Hagah have unknown/unspecified mask shapes still maintains the statistical probability that most of these Toa would, in fact, have masks that don’t match their power.
- Even if people enter contests with custom shapes, the purpose of this contest isn’t to canonize one shape or another as something. There are plenty of mask shapes we’ve never seen before (last I checked there were 23 Greats without canonical forms and the 65 unseen Noble masks, though I can’t remember if that’s counting elemental masks yet). We’re not canonizing anything in terms of shapes, and it’s statistically likely that they’re wearing masks we’ve never seen before.