Not really. It just seems like it would 'prolly happen. Depends on who ya get in the same place at the same time. Challenges fly and then it goes from there.

[For the second question, Marisa is a bit more to the point. She flicks her wrist and a light purple star appears in her hand. It glows softly as she holds it up by one point]

Basically it's a non-lethal battle system we go by. Although some of it could be if we really wanted it to be. Reimu isn't to kind on that though.. Usual battle is about 3-5 spell cards and non spells.

[She tosses the star a bit before catching it and making it disappear in a flash of light]

Non-Lethal but stings when ya get hit.