Christmas at GunpointAnthony HorowitzAlex Rider, book 0.5

Characters in Christmas at Gunpoint

2 characters, main characters first.

Supporting characters

Alex Rider
Also in Stormbreaker, Point Blank, Eagle Strike, Ark Angel, Snakehead, Crocodile Tears, Scorpia Rising, Russian Roulette, Never Say Die, Secret Weapon
Ian Rider
Also in Stormbreaker