This type of glyph represents the king, 'ariki mau, I guess. Let's compare the different details in the Keiti glyphs of this kind:

Ea4-7 Ea4-29 Ea7-31 Eb1-11 Eb2-3
Eb4-20 Eb4-33 Eb6-10 Eb8-14 Eb8-19

Ea4-7, Ea4-29 and Eb8-14 are different. The first two do not have the arms and legs in a cross and the third does not have the usual head-gear. I guess that might mean e.g. that the absence of cross indicates that he is not yet inaugurated as king and that the absence of head-gear shows him in unofficial posture.

Six have the 'eye' towards the right, three towards the left. Does that mean that those with 'eyes' towards the left are looking backwards? I do believe that the 'eyes' really represent eyes in this type of glyph. Van Tilburg (whose judgment I trust) has captured the sun in the eye of the king in a nice picture.