Baloo manifests as a dark blue or purple-furred sloth bear. His early life included a traumatic event where, as a cub, he disregarded his mother's warnings about human traps, known as "iron teeth," resulting in her capture and subsequent death by Dholes; this experience shaped his protective instincts toward Mowgli. He serves as one of Mowgli's primary mentors alongside Bagheera, teaching the Law of the Jungle with an enthusiastic and gentle approach compared to Bagheera's stricter methods, while remaining deeply committed to Mowgli's understanding of jungle survival and ethics. Baloo assisted Bagheera in securing Mowgli's acceptance into Akela's wolf pack, demonstrating his influence within the wolf community.

Profound kindness, care, and unwavering loyalty toward Mowgli define Baloo, who protects the boy fiercely. He exhibits significant bravery and altruism, notably risking his life to defend Mowgli from a hungry mugger crocodile in an attack so severe he was temporarily believed dead. Typically calm and wise, he possesses a capacity for intense, though rare, anger when provoked. Baloo also harbors a well-known fondness for honey, bordering on addiction.

Throughout the series, Baloo participated in numerous conflicts safeguarding the jungle community, including battles against jackals and the pivotal confrontation during a wildfire that claimed Alexander's life. He remained a consistent presence as Mowgli navigated his identity, forming bonds with humans like Bougi (Rahhar) and Meshua (Jumeirah). Baloo witnessed Mowgli's evolving connection to human society and ultimately supported his decision to live in the human village, maintaining their enduring friendship and Mowgli's ongoing ties to the jungle. His relationships extend to other key figures like Kaa the python and members of the Seeonee wolf pack, including Luri and her sons Akru and Sura, reflecting his integral role within the jungle's social structure.