
Quick answer — Kanako Tateno voices Itsuki in Wish Upon the Pleiades, Corrine in Tales of Symphonia: The Animation - Sylvarant Arc.
Kanako Tateno voices Itsuki (Wish Upon the Pleiades), Corrine (Tales of Symphonia: The Animation - Sylvarant Arc).
Itsuki is voiced in Japanese by Kanako Tateno.