Gemini

Tattoos are permanent, which means that whatever image a person selects for their tattoo must be one that they will not regret getting thirty years later.  They have to be completely certain of their choice or they risk regretting it later.  That being said, the best choice for a tattoo is something significant which the person is certain will still be relevant and important to them in thirty years.  The image above illustrates a tattoo of the word Gemini overtop of the Roman numeral two.  There are sparkles and glitter surrounding the image.  The tattoo appears to be placed above the person's waist on their back.
The term gemini refers to the zodiac constellation Gemini.  This reference most likely means the person who got this tattoo is a gemini.  Geminis are born between the dates May 22 to June 21.  They are typically characterized by having a duality in their identity.  For example, they may be brilliant in regards to their studies but also lack common sense.  A simplification of their personalities is that they are people who think of themselves as good while being passive aggressive towards others that they dislike.  They are almost entirely governed by their mood.  If they are in a bad mood they are more likely to act in an unreasonable way that they will regret later.  On the other hand if they are in a good mood they are typically easy going, helpful, and confident.
The tattoo's main symbolism is regarding the gemini and the two.  The two obviously refers to the fact that gemini is a reference to twins.  The choice for the purple gemini as their tattoo suggests that this person is born under the gemini sign and possibly has a twin.  The color, sparkles and position of the tattoo suggest that the person is female.