The following characters can be unlocked in raid mode once enough completion medals are earned.

Character	How to unlock
Alex Wesker	Complete Campaign + Omega Raid Stage.
Chris Redfield	Earn 30 Completion Medals.
Cipher (hologram)	Earn 90 Completion Medals.
Gabe	Complete Episode 2.
Gina Foley	Complete Episode 1.
Jill Valentine	Earn 10 Completion Medals.
Leon Kennedy	Earn 20 Completion Medals.
Moira	Complete Episode 1.
Neil	Earn 30 Completion Medals.
Pedro	Complete Episode 2.