Turnbuckle

Turnbuckle is a Zirrelian, a slug-like alien species with a humanoid shape and multiple tentacles. He works as a pirate and helmsman under John Silver’s crew.

Tall, lean-muscular alien
Tannish or gray-green skin tone (countershaded look)
Slug-like face with small mouth and eye stalks
Eight tentacles total: four used as arms, four used as legs
His limbs can shift roles depending on how he is positioned
Rotating head and flexible posture
Usually wears pirate-style clothing (shirt, belt, shorts, sometimes striped layers)

Highly loyal to John Silver
Acts as a dependable first mate/crew specialist
Not very strategic or clever, but steady and obedient
Enjoys treasure hunting and follows orders without much questioning
Shows strong enthusiasm when Silver is inspiring the crew

Amphibious, slug-like humanoids with octopus-like limbs
Their bodies are flexible enough that gravity determines which limbs act as legs
Likely strong and adaptable due to multi-limb structure
Eye stalks give wide field of vision
Rotating head and flexible neck structure suggest unusual anatomy compared to humans