Slancio is generally energetic and upbeat, ready to move at any time. He can be seen as immature at times, though he normally means the best. He's generally outgoing and carefree, but can turn intense in a moment, his amber eyes narrowed and his poise stiff. He's a good fighter, when it comes down to it, but he'd rather stay out of an avoidable fight, unless he sees some sort of beneficial outcome from it. He's generally described at unpredictable, yet easy to taunt. Slancio can hit up and low moods suddenly, and can turn sullen or gloomy with a couple of wrong words.

He's really caring and loyal though, and his wide grins and excited demeanour makes him easily likeable. Sometimes underestimated, Slancio like surprising those who think he's weaker than he is. He likes to live freely, on his own choices, but once he's committed to something, he's going to stay loyal to it. A sweetheart with a heart of gold, he means well for everybody, and tries to remain the peacekeeper in most situations.