I think I probably made a few fairies before this, but the first one I actually remember making is
Lala Purpleflower. She was an animal talent fairy that I made together with my mom in January 2009.
I didn't really play much then, so I didn't fly with her much. In October 2009 I started playing more and created more fairies and deleted Lala to make room.
I must admit I felt quite guilty about it for a long time and eventually re-made her on a different account. I feel a bit silly thinking about it now.