diff.text: '''Leo the Lion''' is a [[Negaverse monster|monster]] from the [[Negaverse]]. Unlike most of [[Neflite]]'s monsters, Leo's essence was not planted into an item, since Episode 16, ''Who Is That Masked Man?'', is mainly about Neflite trying to kill Sailor Moon, rather than one of his usual energy-absorbing plans. He sends Leo the Lion to attack Sailor Moon and the real Tuxedo Mask. Sailor Moon hits Leo directly in the head with her Moon Tiara Magic. At first he appears unaffected, butwhich hedidn't vanisheseven shortlyaffect after while running toward Sailor Moon and Tuxedo Maskhim. Whether or not he was killed is not specified. However, it is assumed that heHe is recalled by Neflite after he traps Sailor Moon and Tuxedo Mask in an elevator. Thus Leo the Lion may be the only Youma not to be killed by any of the Sailor Scouts.