Hawk's Eye was originally a hawk, until he was turned into a human by Zirconia.
Unlike Tiger's Eye, Hawk's Eye always targeted older women. The exception was when he and Tiger's Eye competed over who got to extract Mina's dream mirror. Whenever Sailor Moon attacked him, he would send a female Remless to kill her.
Hawk's Eye was the last character Sailor Moon attacked with Moon Spiral Heart Attack. He blocked it easily.
While targeting Mina, Hawk's Eye pretended he was a man named Charlie.Queen Nehelenia, and that they were originally a tiger, a hawk, and a fish, and would be changed back if they did not find Pegasus soon. When Zirconia thought Serena was the holder of Pegasus, he sent Hawk's Eye after her. He extracted her dream mirror, but before he could look into it, Fish Eye tried to stop him. As Tiger's Eye held her back, she revealed to him that Serena was Sailor Moon.
Then, Mr. Magic Pierrot appeared, sent by ParaPara to kill the trio, on Zirconia's orders. After destroying Serena's dream mirror, he directed an attack at Fish Eye, but Hawk's Eye jumped in front of her and took the hit. Before dying, he gave the green orb that gave them their power to Fish Eye and Tiger's Eye.
After both were killed giving up their power to rebuild Serena's dream mirror and allow her to transform and destroy Mr. Magic Pierrot, all three of them reverted to their original forms. Pegasus revived them in their human forms, gave them dream mirrors, and took them to live in Elysion.
Hawk's Eye attacks by blowing fire from a torch, acting as a flamethrower.