Kelly
Closer to the centre of the upper tree, atop the main trunk, there is only what could be called a great hall. With flooring of natural wood, and tables made of large leaves and branches, it can be thought of almost as a divine tree house. Various woody offshoots lead in and out, allowing easy passage to other parts of the tree. Aside from  this hall acts the primary meeting area for deities. Many gods might leave a small fragment of themselves here, simply to converse with their divine kin.

This room has one other core feature. A simple water clock. It, and the grains of the roots around it, seems to be the only reliable measure of time for the gods. A consistent natural phenomenon manifested by Gaia. See  for more detail.

To a god, The Tree of Gaia is not indestructible. Any part of the tree, particularly furniture, can be broken. However, it will simply regenerate and regrow soon after. The more damage is incurred, the faster it regrows. Such an act is unadvised, as it is likely to draw the ire of one's kin. Most deities feel a visceral aversion to harming Gaia in any way.
Nathaniel
As he made his way down the branches of Gaia, Wyrd found himself on a path which seemed to lead into... Something. He paused a moment, his hoof raised lightly off of the ground as he considered what might possible lie within. Whatever it was, the god doubted it would prove dangerous, so he stepped inside. 

Whatever he had been expecting, this wasn't it. The great hall was magnificent, equal parts natural and artificial. As he crossed the threshold, Wyrd examined the unusual place, his gaze was inevitably drawn to the main feature: the clock.

Somehow, it's existence made perfect sense to the god. Moments ago, time had been something he hadn't even considered. It was arbitrary. Things happened in the past and would happen in the future, all else was irrelevant. But now, it suddenly had meaning. Three cycles in... Curious. 

Turning away from the world clock, the great deer explored the furnishings of the hall. Much of it appeared to be suited for his smaller siblings, chairs small enough for him to cover with his whole hoof and tables not even reaching his knee. However, he was not without a spot. A section of the table was significantly raised above the rest, and before it was a bed of thickly-brown grass. 

As if compelled by the presence of the spot, Wyrd lumbered over and settled down. It was at perfect height, the table reaching the base of his neck while laying down. If he were so inclined, he could have split open his seam and reach out a claw, grabbing whatever was placed on the table in the same manner that the smaller deities would grab a mug or cutlery. In Wyrd's heart, he knew that this was always going to be the case. Gaia would always provide for her children.
Kelly
"Awwww... I was enjoying the journey. Wake up- wake up up uuuup!!!" Wyrd felt a pulling at his horns for a moment, before a weight was removed from his back. Beside him, Silly fell, hopping from her perch and down to a branchy bench. How long had she been riding him? Hadn't he left her back at the upper branches? Even Silly didn't know the answer to these questions. Or if she did, she'd already forgotten. 

Dramatically, the clowning girl fell back onto the table, causing some loose wood mugs to clatter about. She kicked her legs, clutched over her heart, then looked at Wyrd with her most serious expression. "I am but a poor child, Mr. Deer. I can scarcely hope to traverse alone. My legs ache, and I can support my weight no longer. Please, I beseech you, be my noble steed-"

With a sharp breath, Silly fell limp. Only to immediately sit up a split second later with enough force to give any mortal crippling whiplash. "Are deers steeds? Are you a deer? What do you call a deer steed? Oh oh. I forgot! You need a saddle toooo! Or... I know!" 

"We can make you some friends! But you can't be looking so spooky, Mister." Hopping up onto her knees, she began to start pulling puffy red clown noses out of thin air, placing them on Wyrd's antlers like Christmas tree ornaments. Each one blunted a sharp tip.
Nathaniel
Wyrd was not a god who startled easily, but he was still extremely surprised when he realised that the little clown goddess had been on his back the whole time. Or perhaps she had just manifested there on her own, it was hard to tell with that one.

The god slowly rose to his feet as Silly got to work dulling his antlers, careful not to move too quickly and risk hurting the mischievous goddess. 

"You may ride on my back if you wish, little sister. You already were before asking..." Wyrd rumbled, his eyes trying to follow her erratic movements and quickly failing. 

"I can go greet the other deities too, if you insist. Must you really blunt my antlers, though?" Wyrd said, a little exasperated, though he made no effort to stop the silly goddess from going about her work.
Kelly
"Mhmm! It's important work! Fluffy red is a happy colour so when you meet everyone, they'll be happy to see you!" Silly nodded solemnly, agreeing with herself as if she'd revealed a great philosophical truth. She then sprung back up to her feet, jumped up into the air... And didn't come back down.

Any observer that might try to follow her trajectory would lose sight fast. She simply zoomed out of the field of view. But, in any resulting confusion, Wyrd would feel a little tap on his head, and a weight shift on his back. A weight that - just like when Silly first rode him - he'd never noticed its initial arrival. Not exactly, at least. "Come ooooon! Let's gooooo! There's so many gods to see. You should check out the uuuh-"

Silly paused, then giggled to herself. "Hey hey, guess what."