Fumie Kumatani on The Best of Sonic the Hedgehog Part 2: True Colors:

Fly in the Freedom

In this song, we appointed the two singers, Tabitha Fair and Todd Cooper, both are the owners of the sweet voice that they had performed gently and I thought it is perfect for Rouge’s bewitching atmosphere. When I saw Rouge’s magnificent appearance, I absolutely wanted to use the vibraphone in the theme, and what’s more, The sound is a little jazzy feeling…, it flashed into my mind immediately. Actually, the scat of the interlude is a part that we completed first as the image in which Rouge spies.