Board Thread:Questions and Answers/@comment-918732-20160414155022/@comment-1257201-20161003043618

A major DC character ("X") had learned the secret identity of a certain DC costumed adventurer ("Hero"). The Hero was worried that X's knowledge might fall into the wrong hands. X agreed. So X gladly consented to have the knowledge wiped from their mind, and it was.

Identify the two DC characters.

(I'm thinking of a specific example, but for all I know there are many correct answers. Of course, any correct answer "wins".  But the important thing is that X is a major character, not some one-shot guest star.  When I read the story, I was shocked that X would agree to such a thing.)