We have this. In her pop-up, at the end of the Mimic box it says "Currently copying: ..."

Edit: Just noticed, however, that depending on her placement, that box isn't always visible - it was visible when i wrote the above, but after switching formations, that particular info box is now sometimes part of "+4 more"

I second that. I used to be able to see that tool tip when I hovered over Mindy in formation just fine. However, ever since I upgraded her to LLL I cannot see that particular tool tip. It takes several tries to find the right bubble around her when she's on the field. Made more difficult b/c I have Karen in formation too so the circles are constantly flying on and off the field.

I'll add to this by making a suggestion is to show the list of mimiced abilities on the other tooltip that shows up when you hover over the ability on the bench. This could be useful for some abilities on other crusaders as well. I.e. make the bench tooltip match the field tooltips.