Spinner is an Arachnet Slug who belongs to Eli Shane. Spinner is listed as one of Trixie's favorite Slugs, although Eli has confirmed that Spinner is indeed the name of his Arachnet. He plays a main role in "The Journey Home" helping the rest of the Slugs get back to Eli by spitting web strands to reach higher areas. He is one of Eli's strongest Slugs.
- Protoform Abilities - Can spin a web line, or create a small web-like net.
- Grapnet - Shoots a web line back at the slinger while flying through the air, then grabs on to a wall, like a grappling hook.
- Webwall - Spins a stretchy net wall across an opening or battle area. Can stop a fall, or fling attacks back at an opponent.
- Eli caught Spinner while trying to catch a Hoverbug in "Mecha Mutiny".