Considering none of them know much about those shadows, if they see someone else touch it and go crazy, then they'll definitely be wary of it. Some may try to attack, though.

Also, did you know that summoning a persona that fit with the light (or darkness If he went a different path) was one of the power choices I was going to go with for my character before I scrapped it for something else?

Also, the pther option's good too.

On an unrelated note, do you know which persona is in mu signature, and what arcana it is?