Lan

藍

Lan's real name is simply C; it is Gingetsu who chooses to call him Lan (Ran). He was known as C because he was one of the three-leaf clovers that once existed, and those triplets were named A, B, and C. He is now the sole survivor, and because he lives away from the Clover Project research facility, he is aging rapidly (which explains why Ran appears as a child in the final volume's flashback, yet as a late-teen or early-twenty-something boy in other volumes, even though only two years have passed since he first met Gingetsu). In fact, his life will end in five years. Although he is aware of this, he still wishes to remain away from the facility—not merely for freedom, but specifically to stay beside the person most important to him.
Ran's character remains largely undeveloped until the last volume, which includes a flashback detailing how Gingetsu and Ran met and how their relationship began. However, Ran differs from Gingetsu: as a child, he is quite mature for his age, yet he is innocent, caring, and kind, with no apparent difficulty in expressing his feelings. He does not want anyone to suffer and is always ready to help if necessary. He is sweet and nice, but not weak; his existence has been difficult thus far, and although he knew it would not be easy, he decided to seek change by running away, risking his life in search of freedom.
(Source: Unspoken)