Totto, alternatively named Cassius or Sylvester across Jungle Emperor/Kimba the White Lion adaptations, fulfills diverse roles. In the original manga, he acts as comic relief sidekick to Bubu, characterized by fearfulness and cowardice. He constantly worries Bubu might harm him during fights with Kimba, maintaining physical distance and establishing a subordinate dynamic to the more aggressive Bubu. The 1965 Kimba the White Lion anime transforms Toto into a distinctly antagonistic figure. He becomes the strategic mind behind his partnership with Bubu, demonstrating cunning, connections to villains like the Black Four and Gypsy the Owl, and a willingness to commit murder. He openly despises subordinates like the hyenas Tom and Tab, yet remains cautious not to overly provoke Bubu. The New Adventures of Kimba the White Lion (1989) retains Toto's villainous partnership with Bubu, positioning him as a secondary antagonist. Specific narrative details regarding his character in this series remain undocumented. The 2009 film The Brave Can Change the Future reimagines Toto as a genetically engineered panther clone, the last of his kind. This iteration presents him as a tragic figure questioning his existence as a "failed product." Initially opposing Leo, he ultimately allies with Leo against their human creators. His arc culminates in self-sacrifice: he enables Leo and Kenichi's escape from a collapsing structure. His final dialogue expresses unresolved anger towards humanity yet finds purpose in his sacrifice: "I wasn't meant to live in this world anyway. I'm a failed product after all. Leo, I haven't forgiven the humans. Ken'ichi, have our screams reached them at all? That's all I needed. Thanks. This is my way of leaving my mark." In the Leo the Lion: Onward Leo! sequel series episode "Devil Falls," Toto appears independently under the name Silkar. He survives as a solitary predator who slaughters weaker animals. His interaction involves attempting to devour Leo's cubs after they offer him food from a jungle garden, maintaining his predatory nature despite their benevolent intent.