Starting to refine my Vocaloids' personalities:
-Miku is outgoing, kind, intelligent and altruistic.
-Gumi is laid-back, easy-going and cheerful, an optimist who goes with the flow.
-Avanna is gentle, reserved and polite, with a heart of gold.
-Not a Vocaloid, but Teto is cheerful, eager, and determined, with a mischievous streak and a desire to prove herself. (also she's really fun to draw)