His only attire is a sky blue long-sleeved T-shirt that he wears all the time. He also has a small nose and black mouth. He has beady black eyes and thin eyebrows. Roo has light brown fur and an upturned tail. Roo is a joey whose height is similar to Piglet's. Roo was, in fact, the first member of the Hundred Acre Woods to befriend a Heffalump, which kickstarted a mutual understanding between Heffalumps and the Hundred Acre Woods gang. He was initially afraid of Heffalumps due to the legends he had heard from the adults around him but was open to the prospect of a Heffalump being just as harmless and friendly as the Hundred Acre Woods residents. Roo is rather wise for his age, at times. When Rabbit forbade him for tagging along, Roo ventured into Heffalump Hallow anyway. Roo was the most excited to catch a Heffalump in Pooh's Heffalump Movie and scoffed at the idea that such a mission would be too dangerous for him to handle. His fearlessness also drives him to be daring and even a little rebellious. Rather than panicking, he remained happy-go-lucky, despite how worried the adults were.

Another example is the time Roo was caught in a river. He is also optimistic and fearless when he and Tigger were stuck atop a tall tree, Roo remained calm and upbeat throughout the entire ordeal while Tigger was petrified. He acts his age, being curious and energetic. Roo takes after Tigger in that he is spirited and adventurous. Since Lumpy's introduction, he and Roo have been portrayed as best friends and spend most of their time together. When not with Tigger or Kanga, Roo spends his free time with Dexter, Owl's cousin. However, his young age sometimes prevents him from tagging along on Pooh's adventures (mainly because Rabbit and even Tigger believes Roo's too young for certain expeditions). Roo's youthful and energetic personality (as well as his natural love of bouncing) makes him the perfect companion for Tigger, with whom Roo shares a relationship akin to two siblings. He rarely spends time in his mother's pouch and will often take part in the shenanigans of Pooh and friends without Kanga's involvement. More modern Pooh media depict Roo as slightly older and more proactive. The earlier shorts also depict Roo as still learning to speak, as he was unable to pronounce Christopher Robin's name. The earliest Pooh shorts, such as Winnie the Pooh and the Blustery Day and Winnie the Pooh and Tigger Too, portray Roo as a toddler that spends most of his time tucked inside his mother's pouch. Roo is, unsurprisingly, the youngest member of Winnie the Pooh's circle of friends. They live in a tree house where they have a conjoined mailbox. Piglet's Big Movie suggests that Roo and his mother, Kanga, are the most recent residents of the Hundred Acre Wood. 3.2 The New Adventures of Winnie the Pooh.2.5 Winnie the Pooh: Springtime with Roo.2.2 Winnie the Pooh and a Day for Eeyore.2.1 The Many Adventures of Winnie the Pooh.

The doa of pooh