Inforest, Riku sports the real deer mask, default antlers with candles, and the frosted pelt - though during special occasions or when he feels particularly threatened, he can be seen with the skull mask instead. However, in artwork and such, he should be portrayed with an actual deer face. Riku is rather tall and well muscled, despite his somewhat slender build, and can run farther distances than the average stag. Candles adorn his antlers, almost always lit, made to represent a change of his alliance, and he has a strange, black, symbol on the upper side of his left hind leg. He has long fur, his pelt a bit of a dark shade of grey, along with his legs and tail while his underbelly is a creamy white. He has pale, blueish green eyes, and long, silver hair that falls down to just above his shoulders. During Halloween, he can be seen wearing a black blindfold, though it is usually tied around one of the tines of his antlers.

Riku is cool, calm and collected - though it doesn't take an awful lot to get on his nerves. Oddly possessive of the few close friends he has, he shows a great amount of loyalty, and will go to the extremes to protect them. As serious as he may be, he does have a good sense of humor and can be a bit fatuous when the mood strikes. Betray him and you lose his trust, as he is not one to forgive easily; admittedly, it is harder to gain his trust in the first place, and even more difficult for him to open up. He can be quite territorial, especially over this tree near the pond. Even since arriving in the forest, Riku has become extremely curious about its origins and tends to wander about, exploring. Still wary of the forests occupants, he usually won't be the first to approach any deer unless necessary and keeps mostly to himself. This doesn't mean he himself is unapproachable, though, as he is accepting of almost any company.