Baloo appears as a sloth bear, typically depicted with purple or dark blue fur. He serves as one of Mowgli's primary mentors and closest companions within the Seeonee wolf pack. During his own cubhood, Baloo ignored his mother's warning about "iron teeth" (traps), resulting in a situation where she saved him from capture but was killed by dholes during the rescue. This early trauma informs his protective nature.

He exhibits a consistently friendly, kind, and caring disposition, forming an immediate attachment to Mowgli upon their first meeting. Baloo demonstrates wisdom and fairness while instructing Mowgli and the wolf cubs in the Law of the Jungle. His protective instincts are strong, prioritizing Mowgli's safety above all else. A notable trait is his intense fondness for honey, bordering on obsession. While generally patient, he displays rare moments of anger and aggression when confronting threats to those under his care. His bravery is evident, as he fears little when defending his friends.

As a teacher, Baloo adopts a gentler approach compared to other mentors like Bagheera, though he remains committed to imparting crucial survival knowledge. He actively advocates for Mowgli's acceptance into Akela's wolf pack, collaborating with Bagheera to secure his place. His role extends beyond teaching, positioning himself as a guardian figure. A significant demonstration of his loyalty occurs when he fights a hungry mugger crocodile to protect Mowgli, an act so fierce he is temporarily believed dead. He later reappears, confirming his survival.

Baloo maintains strong bonds with the wolf pack members, functioning as a de facto member himself. His interactions with Mowgli highlight deep mutual affection and trust. Throughout Mowgli's journey of self-discovery and identity struggles, Baloo provides steadfast support, guidance, and protection. His actions consistently reflect altruism and courage, particularly evident during confrontations with jungle threats.