Hisoka's tattoo is a black spiral symbol depicting the antinomy of his personality, which contains both good and evil. Hisoka sees it as an expression of his own philosophy: “Always accept contradictions in life”. The tattoo serves as a reminder that he must live by this principle if he wishes to remain true to himself. It also serves as a reminder to all who encounter him that Hisoka is not a person to be taken lightly. He may appear cheerful and carefree, but beneath the surface lies a much darker side which can easily bring destruction and danger if provoked. The tattoo itself is a reflection of this duality, demonstrating both the yin and yang of Hisoka's personality. It also serves as a warning to all who cross his path that he is not someone to be trifled with. Ultimately, the tattoo symbolizes Hisoka’s willingness to accept both the good and evil sides of himself and reminds him that only through balance can true harmony be achieved.