Seviper, unlike the other slithering assclown Ekans, isn't a total fucking douchebag. He is legitimately just a funloving bastard is all. Regardless, he still plays pranks from time to time but he generally doesn't mean much harm to anybody else in the current area he's in, which, again, is very much the opposite of Ekans, who loves to just try to kick anything's ass.
He, unfortunately, does absolutely nothing. He tends to avoid anything serious and tries to just enjoy himself whenever. Usually comes when mentioned (so basically never). Sssspeakssss with ssssort of a lissssp.