If you pick a base character then the prime gets removed as well, the better version cant exist without the base version, however if you remove a prime version then the base character can still exist. My personal pick would be Valkyr due to how [IMO] useless she seems
as someone who mains Octavia I take great offense to this because you’re clunking all of us together, some of us just use her casually and not try and break the game entirely just because we can