'Feathers' on the head indicate that sun is 'present' (and not away far in the north with his 'winter maid').

Ariki glyphs seem to be located as last glyphs seasons (cfr above). In Ga2-21 the top left 'limb' is ending with a vertical short line and in Ga7-6 it is the right top 'limb' which is similarly 'cut off'. The sign evidently means 'a tertial is ending here'.

A variant without headgear and looking straight ahead at us probably is indicating a more important cardinal point: