In Love Hina anime, Naru is identified as type 2-D (if i still remember it correctly). I do not know if that personality/character identification (or watsoever u call it) is just a made-of, i mean anime-exclusive only, or derived from real psychology terminology (or watever u call it). Im still looking for it in the net dat kind of chart but I only end up finding different: Raymond Cattell's 16 Personality Factors; Big Five Personality Traits; and Revised NEO Personality Inventory. But there were not the one im looking for. If u can help me, I will really appreciate it.