Leo was a young adult who dreamed of being part of the Terra Venture Space Coloney. He snuck on board as a stowaway before the coloney went into deep space. His brother Mike ( who was a high ranking GSA offiicer on the misson) was not very happy that he did this. When Mike and Kendirx followed an alien named Maya through a portal (to save her alien village) Leo followed. Leo was horrorified to see his brother fall through crevice. Before he fell from the crivice Mike gave Leo the Quasar Saber he had pulled. Leo was able to access the power of the Red Galaxy Ranger. Leo dedicated himself to honor his brother's memory by trying to fight as well as he could. Leo would make friends with the Lion Glactabeast. Leo was very immature at times which cashed him to clash witth Kai. Leo tried to jion th GSA and Kai was charged with training him. Leo made a mistake that allowed a monster to get Terra Venture's weapons. Luckly Leo was able to help recover them. Leo quit the GSA since it wasn't for him but became closer with Kai. The Lion Glactabeast was able to change into a Galactazord. Leo was saved from an explosion by the Megna Defender.
Leo thought he was Mike but was discouraged when the Defender acted so coldly. Leo was able to obtain the Lights Of Oroin with his friends. He tried to convince the Megna Defender to be good. He learned that Mike's essense was being used by the Megna Defender. When the Defender sacrificed himself to save the coloney Mike was released. Leo tried to give Mike his saber but the older brother told Leo it was his distiney to be Red Ranger. Leo was happy to see Mike become the new Megna Defender. In a fight to the finish Leo was able to kill Scorpious. His daughter Trakeena vowed revenge after taking her father's place. Leo was horrorfied to see Kendrix die but welcomed new team member Karone with open arms.
With Karone's help Leo was able to obtain his mega battle. Leo tried his best to find away to escape form the Lost Galaxy when Terra Venture found itself trapped in it. The coloney was able to escape when Leo and Kai used a spell from the galaxy book. Leo faced Trekeena after Terra Venture Crashed on the moon of its destination. Leo's friends came to his aid. Leo used his mega battle to defeat the mutated Trakeena and saved the coloney. Leo returned his saber to its place on Marinoi (where the citizens of Terre Venture would settle) .
Leo journeyed to Earth to help the Lightspeed Rangers battle Trakeena, Tri Skull and the Demons. Some years later he jioned a group of Red Rangers to stop the Machine Empire from using Surpenteera.
Leo started out a over zealous young teen . His time as a Ranger matured him and let him learn responsibility. Leo rose from Mike's shadow and became a great Ranger.
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