Excluding the male and female variants of Robin, Corrin, Morgan, Kana, Byleth and Shez, the only heroes to have more than one English language voice actor are Lucina, Palla, Olwen, Sanaki, Byleth (Male), Mia, Elincia, Cherche, Ogma, Lon'qu and Jaffar. Lucina and Palla are both voiced by an uncredited Laura Bailey for their normal variants while Alexis Tipton provides the voice for their other variants. Olwen and Sanaki are voiced by Erin Fitzgerald for their normal variants while Tara Sands and Sara Cravens respectively voice their other variants. Byleth (Male) was originally voiced by Chris Niosi, but was replaced upon the character's release by Zach Aguilar due to the former breaking their nondisclosure agreement. Mia was voiced by Lani Minella up until her summer variant, where she was replaced by the late Philece Sampler (credited as Robin Bell), who in turn was replaced by Anne Yatco starting with her Young variant. Elincia and Cherche were voiced by Amanda Céline Miller until she moved out of Los Angeles, and was replaced by Heather Gonzalez going forward. Ogma and Lon'qu are voiced by Travis Willingham for their normal variants while River Kanoff and Gabe Kunda respectively voice their other variants. Finally, Jaffar was voiced by Walden James up until his Resplendent variant, where he was replaced by Jason Vande Brake.
Excluding younger versions of characters and the male and female variants of Robin, Corrin, Morgan, Kana, Byleth, Shez, and Alear, the only heroes to have more than one Japanese language voice actor are Cordelia, Gotoh and Medeus. Cordelia was initially voiced by Eimi Okada, but was taken over by Mii Miki beginning with her Winter variant due to the former's retirement. Gotoh was initially voiced by the late Motomu Kiyokawa, and has since been replaced by Motoki Sakuma beginning with his Ancient variant. Medeus is initially voiced by Chafurin but was recast to Tatsuya Kobayashi for his Ancient variant.