Here's the result from the polls. Honestly, I haven't thought on the specifics of how they merge until this work.
Concept-wise, Naomi (in her symbiote form) is very flexible, and have a more plant/vine-like structure. On the merging process, the idea I have is the main host puts on Naomi like a piece of clothing, and Naomi reforms herself to fit. On the poses, I had both of them dancing in mind since this is a mutually agreed process.
After finishing this, I did think it would look better if there were more mixing of fluids involved. Will improve on it in future works.