Ideas:

1. Evidently this glyph carries essentially the same meaning as the similar glyph in Mamari, which probably should be read as Otua:

Although the toes of the sitting god is not seen in the Mamari glyph, the bent knee is there.

2. The number of feathers in the Mamari glyph is 15, which perhaps tells us that the gods are assembling at the time of full moon (15th night).

The number of feathers in the Small Santiago glyph seems to be complex. At first we can see 6 large ones at the left, sorted in 2 + 4. Then comes 8 medium sized, which at first seem to increase in size and then decrease. At the end there are 3 very small feathers not clearly attatched to the head of the god. I am not prepared to try any explanation at this stage of the investigation.

3. The presence of god(s) is not necessary to document in a glyph like this - and in London Tablet there is no such glyph - because we have already seen a couple of them: 'Tohil' and 'Mundo'.