Here is the latest concept of Zayna in her octomaid form. I had trouble if she'd have her normal human ears while in that form or having mermaid ears like Pearlina. I had trouble decide if humans and other landcreatures get some fishlike features when they're in mermaid form after drinking the Mermaid potion in order to explore the ocean.

Sorry about the eyes I drew on the version B. I gotta be careful to use markers and draw with sketch pencils first. I gotta practice drawing the tentacles too.