The Kit Fisto lightsaber is a green-bladed lightsaber capable of functioning underwater. Jedi Master Kit Fisto wields the single-bladed lightsaber during the Clone Wars.
Bounty hunter Aurra Sing wields a single-hilt lightsaber with a red blade in Star Wars Legends. She acquired her lightsaber by killing a Jedi and taking the lightsaber from them.
A green lightsaber is one of the most common lightsaber blade colors. In Star Wars Canon, Luke Skywalker, Yoda, and Qui-Gon Jinn wield a green-bladed lightsaber. In Star Wars Legends, Jacen Solo wields a green-bladed lightsaber.