Tanaka is a man of tall stature, nearly 190 cm tall (6'3").[1] He has gray eyes and blonde hair with black roots, and light stubble on his chin. He wears sunglasses, dark green sneakers, black pants, and a slightly dirtied white button-down shirt over a black undershirt. He also wears a dark green fanny pack facing his back and keeps a pen hooked on his shirt pocket. There is a patch of scar tissue on the right side of his neck.Tanaka has a carefree, aloof demeanor. He can keep up friendly conversation, but both Asako and Yoshiki describe him as somewhat strange.[2][citation needed] As demonstrated in his interactions with impurities, Tanaka is decisive[3] and able to keep a level head during intense situations.[4] He must have reasonably strong intuitive judgement, since his line of work requires him to make assumptions about impurities that he can't actually perceive himself.[5] Tanaka despises the Company he works for and doesn't want them to achieve their goal of obtaining an Illegitimate.[6][7] His personal motivations related to the matter drive him to take on Case AA-104 so he can interfere with the Company's objective,[8] a task which he takes very seriously.[9] It matters to him to the point that he is willing to damage or sacrifice parts of his body for it.[10] Despite his aloof demeanor, Tanaka demonstrates large acts of selflessness. For example, he goes out his way and willingly suffers a serious impairment[11] to close the hole in Udekari, even though it is unrelated to his job with the Company.[8]