Quick Question about Zelda Universe

So under everybodys name it says "Deku Scrub" or "Goron".
How do you change that?
Or does it change on its own...?

Ranks
Beneath everyone's name, there is a title. These titles correspond to the post count of the user. Once a user has been a member for 120 days, and has at least 50 posts, you gain the ability to customize your rank.

The ranks are:
» Deku Scrub (Minimum Posts: 0)
» Gerudo Thief (Minimum Posts: 30)
» Goron (Minimum Posts: 100)
» Zora Warrior (Minimum Posts: 250)
» Hylian Knight (Minimum Posts: 500)
» Royal Hylian (Minimum Posts: 750)
» Sage of Wisdom (Minimum Posts: 1000)

Make sure to read the rules and check out the Newbie's Guide to the Universe while you're at it.

*lock*