Suggestions by @emmawelch

Daisy Ridley

as Thorn in Wings of Fire series

Score: +2

Jeff Wahlberg

as Turtle in Wings of Fire series

Score: -1

Bryce Dallas Howard

as Beverly Crusher in Star Trek The Next Generation

Score: +1

Tom Hiddleston

as Data in Star Trek The Next Generation

Score: +3

Isaac Kragten

as Wesley Crusher in Star Trek The Next Generation

Score: +1

Levi Miller

as Wesley Crusher in Star Trek The Next Generation

Score: +1

Ricky Gervais

as Wheatley in Portal

Score: -2

Peyton Meyer

as Jeremy Johnson in Phineas and Ferb

Score: +4

Nick Jonas

as Qibli in Wings of Fire series

Score: +4

Letitia Wright

as Sunny in Wings of Fire series

Score: +2

Zendaya

as Tsunami in Wings of Fire series

Score: +3

Thomas Brody

as Starflight in Wings of Fire series

Score: +3

Josh Hutcherson

as Clay in Wings of Fire series

Score: +1