Leif presents himself as well-mannered and polite, speaking in a royal "We" instead of using "I". He is also known to be knowledgeable and intelligent, as he suggests several means of traversing Snakemouth Den. Despite this bluntness, he is shown to be loyal to those he trusts, namely Team Snakemouth. Despite his stoic facade, however, Leif is shown to have a weak spot towards domesticated bugs like Aphids or even towards smaller characters such as Tanjerin, often calling them "cute".