June was a bounty hunter who traveled around the Earth Kingdom and Fire Nation. Of all the bounty hunters in the world, she was the best and most expensive of her time. She was a mercenary and had no allegiance to any nation, only to the highest bidder for her services.
She was confident, self-assured, and possessed a dry, sarcastic wit. She was also considered quite beautiful, in a dangerous sort of way, and had incredible physical strength. June would arm wrestle men in bars on a bet, then squander her winnings on a round of drinks. June wore a band with a skull adornment around her top-knot.
She hunted her prey with the help of her mount, a giant beast called a shirshu. Though blind, the shirshu, Nyla, saw by means of its powerful scent receptors, and June claimed it could "smell a rat a continent away". To capture her targets June depended on her shirshu to use its long whip-like tongue coated in paralyzing neurotoxins to immobilize them.
June originated from the Earth Kingdom where she spent her childhood traveling with her father, who was also a bounty hunter. It was from him that she adopted the tracking and fighting skills she employed. June's father received a shirshu from a rare animal collector in payment for a bounty, and gave it to her. The shirshu become June's inseparable companion.
Early in 100 ASC, June tracked a fleeing target who had stowed on board Zuko's ship and captured him while inflicting mild damage to the ship. Iroh developed an immediate interest in her while Zuko was angered, though quietly impressed, with her proficiency and skill. Finding her afterwards, they employed her to track down Aang by following his trail after obtaining Katara's scent from her necklace. They successfully found Aang at a nearby abbey where she was largely occupied with an angry Appa. Eventually Nyla was blinded by a large quantity of perfume that Katara had waterbent over it. As the shirshu lashed out in confusion, June and Zuko were both temporarily paralyzed. Iroh caught and supported her and was quite content to feign paralysis simply to get close and hold her. Although the act clearly annoyed her, she could not do anything about it.
Much later, a reformed Zuko and Team Avatar went in search of her hoping to use her shirshu to find the currently missing Aang. Initially, June was not interested until Zuko gave her some encouragement, mentioning "the end of the world". However, Aang's scent could not be found, because according to June, the Avatar was gone. He no longer existed in the world. Instead Zuko suggested they search for Iroh, hoping he would know; she soon led them outside the broken walls of Ba Sing Se, saying that Iroh was just on the other side of the large pile of debris and with her job complete, she gave a final farewell to the group and rode off.
After the Hundred Year War, Zuko hired June in one of his many attempts to track down his long lost mother; however, her search delivered no results.
In June's profession, she had to mix with a variety of people from unsavory to low life as well as regular characters. Her determination, resolve and superior physical strength enabled her to get the job done in the toughest of assignments. June's character along with her shirshu's abilities made her a force to be reckoned with - a fearless and non-fragile woman who was rarely misunderstood. June was also confident and decisive, though occasionally sassy. While she was often dark and uncaring, she did not ask for payment from Zuko when he said that the world would be destroyed and needed her help, proving that loyalty to her pocket was not the only consideration, although since she was in the Earth Kingdom at the time, it may just have been self-preservation.
June was a professional bounty hunter and an experienced shirshu rider, who knew how to ride it when it leaped and ran great heights and distances. June was also known to be skilled in using the whip. In addition, she was very strong which had been demonstrated by her effortlessly defeating a muscular man, who struggled terribly against her in their arm-wrestling match. Further proof of her brute strength was lifting up two men; the first being the stowaway and the other being the man whom she was fighting in the tavern, when Team Avatar, with the exception of Aang and Momo, came looking for her. She was shown to be able to defeat opponents before a cup she was drinking from hit the ground. June proved to be a formidable fighter, as she demonstrated amazing speed, hand-to-hand combat skills, and evasion.
June sarcastically teased Zuko and Katara about being a couple, much to their frustration.
In "Bato of the Water Tribe", June treated Nyla very harshly, but in "Sozin's Comet, Part 2: The Old Masters", she treated him much more kindly, calling it her "snuffly wuffly".
There has been some confusion among fans whether her name should be spelled "June" or "Jun". "Jun" is a more authentic Japanese name, used in many anime. However, the credits and Nickelodeon website both spell the Avatar character's name as "June".
June's design was inspired by staff member Lisa Yang, and her shirshu's name Nyla is also the name of Yang's Rottweiler.
A seeming nod to June's toughness could be seen in her bar room antics, where she arm wrestled a man bearing striking resemblance to Ryu, the main protagonist of the Street Fighter series of video games.
By the time Team Avatar met up with June, she and Nyla had been a team for more than seventeen years.