My FIRST first UTAU was actually someone called Blanche, inspired by my growing interest in Vocaloid at the time. Unfortunately, she never got past the concept art stage as I preferred another character I made from my random "lololol one of my chars look like Miku 8D" doodle.
That character was Iris Cadenza's first design.
Originally I was supposed to make both of their VBs, with Blanche as the girly-girly voice type and Iris being the opposite (sort of, my voice's capabilities are pretty unreliable xDD), but over time I slowly lost interest in making Blanche and favored Iris instead.
tl;dr: My first ever UTAU was Blanche, and she never happened. :C
Although, one of my old rerecorded banks for Iris sounded like the Blanche I imagined back then. It's still sitting in my laptop, gathering digital dust, so... :0