Ash the Eevee (Debuts in Chapter 8 of ES FP):

Age: 2

Nature: Brave

Characteristic: Loves to Eat

Ability: Adaptability

Moveset: Take Down, Double Kick, Dig and Iron Tail

Izzy the Eevee (Debuts in Chapter 10):

Age: 1

Nature: Gentle

Characteristic: Often Lost in Thought

Ability: Run Away

Moveset: Swift, Bite, Baby Doll Eyes and Covet