The Thunder Twins mentioned in Thursday could represent two seasons following the 'deluge' in high summer. In midwinter the two 'years' are sitting low and back-to-back like Janus, but in high summer (Hb9-42) they are standing and united, face-to-face:

Hb9-40	Hb9-41	Hb9-42	Hb9-43	Hb9-44	Hb9-45	Hb9-46

Lightning (kava) comes with the rain clouds, and the Thunder Twins could be two equally long seasons in the 2nd half of the year.

I have listed 26 glyphs in G as maitaki. Two of them are relevant in the present discussion, the only ones which combine maitaki and henua:

Ga5-5	Gb4-3

Admittedly Gb4-3 is far from obvious. The head of tagata is a sign of maitaki and at right (below the 'waves') is a sign which I once classified as henua. Nothing else is suitable according to my system of classification. But it is a 'ghostly' henua.