Pseudo-Nim is correct; "The gender of the one being sexed by the snake determines if the tag is placed in the female or male namespace." "Notes: Should not be confused with snake boy or snake girl.", which is the one that determines the snakes gender.
Base +9, Venombahamut +6, DevilsAdvocate -7, amyblue +6
Let's just use F:"snake girl", for this galley and dump both m:snake and f:snake as those two were obviously intended to be used for non sentient snakes in ways that would evoke the bestiality tag.
Even though six eyes isn't as human as a lamia or gorgon, she is obviously sentient and anthropomorphized. She sits under the furry tag and doesn't involve bestiality so I feel like f:"snake girl", suits the situation best.
Why does this site not allow quotation marks in comments? Did they code it as changing font or something stupid like that? Can't see quotation marks in finished comments on mobile. Weird.