It would be similar to vanilla Crusader. Cannot self. Give a player defense, but instead of attacking a random visitor, it would instead reveal a random visitor with their role to the Crusader. Would still get target attacked notification if the target gets attacked.
Example of an attacked by coven result:
"Your target was attacked last night!"
"You have detected a visit from (3) Prismatic, the Medusa."
It would only show roles, not true alignments. But unlike Potion Master and Baker, this wouldn't detect Egotist Townie either, which would instead appear as a normal townie to this Crusader. For example, if Egotist Tavern Keeper tried to roleblock the target, the Crusader would still detect them as a normal Tavern Keeper.
Recruit Crusader in particular also reveals the role to their other Recruit, but without the Recruit receiving a feedback message about it.
Other non-Town Crusaders (TT, egotist, and swapped) still only reveal it to themselves.
This would allow Socialite to take back the role of UOs back from Crusader, even in BTOS.