I am not sure what exactly this character is, because it looks some made-up kanji character with a round circle at the bottom. Other part than that seems to me "men" (免), meaning permit/permission, escape, or free of.
It is usually used with other kanjis like "免許" (menkyo: permit) or "免除" (menjo: exemption).
Another unclear, meaningless tattoo of the kind.
