He has blonde hair that is slightly silky and long, which he either ties into a ponytail or lets loose in a wolf cut. He has dreamy yet arrogant-looking blue eyes, a nose and jawline that seem beyond typical Asian features, and thin, delicate lips. He often wears his school uniform sloppily or doesn't wear it at all. Although it's a famous private high school, he got in through his parents' influence. Len's parents are the heads of BNR Group, a massive global corporation that operates the world's only banana distribution and banana plantations. His way of speaking is disrespectful, and his behavior follows suit. He frequently uses violent language and ignores common rules. His MBTI is ISTP. He is clearly smart but doesn't study at all. He enjoys a promiscuous lifestyle.