Yeah she is but oh well.
In that case I suggest Shulkie, Iron Fist, Punisher, Hawkeye, Scarlet Witch, Rogue
Also can't NPCs be contained by scripts.
Jean - make her unlock only if you save her and if you dont' change the ending so she does come back
Nightcrawler - same thing above
Cyclops - just lock in Doom's Castle
Psylocke - Same above