He wears an orange baseball cap, purple shorts and white shoes.
Each foot has three toes.
Leo has a liking to food.
His father is an accomplished chef who works with the traveling circus, preparing meals for the members as well as his family. Leo is quite a good cook himself and is taking classes to improve his skills further. This is shown in C'est Cheese, where he is shown taking a cooking class in Paris, France.
Leo tends to be the most nervous of his friends, as he oftentimes has nervous breakdowns about the problems he encounters, though he can be extremely brave when it come to helping others, such as in Barcelona Birdy, in which he not only helped Eva reach her home, but saved her life twice.
He's also really kind, shy, and sometimes even a bit sensitive when things go wrong for him.
He has a habit of pulling his ears whenever he is nervous, scared, or in disbelief.
With all this being said, it's important to note that Leo is not as mean as Modern Carmen or as kind as Andy or Classic Carmen, but he's still a rather kind and sensitive kid with a lot of fears, worries, and occasional grumpy moments.
Leo, his family, and his friends are part of a traveling circus known as "Circo Fabuloso", which travels around the world. As a result, He, alongside his friends Andy and Carmen are never living in one area at once, and become unfamiliar with their surroundings. Luckily, the three of them have Luna the Moon who travels with them all the time, and knows almost everything therein to know about the country they are located within at any given point.
Many of the episodes pertaining to him often focus on the food about a particular nation's culture, in which Leo wants to learn more about the many foods a nation has to offer. While in London, he led his friends in finding all the foods the British capital had to offer, from the traditional dish of Fish and Chips, to more foreign delicacies (as London as a blend of many world cultures). After learning about (and trying) the different foods of the world, Leo will often go on to impress his friends and family, most notably his father Wolfgang.
In "Pulling Strings", Leo, alongside Luna, work together to get Andy and Carmen to become friends once more after a bitter argument causes both of them to refuse to talk to each other. The two accomplish this by performing a traditional Indian Kathputli play, which combines both art and music to create a story. Although the plan ends up going horribly wrong, it manages to get Andy and Carmen to reconcile.
Despite being Australian, Leo does not have an Australian accent.