I encountered something weird during a 2 on 2 match, 3 CPUs, random set-up. I was running the game without Applocale (too lazy to set-up paths in my friend's PC). Haven't tried the above patch yet.
Shortly after the match started, I accidentally dashed into a dashing Cirno (teammate), and initiated a 'shoot-out' sequence.
Note the radar team colors.
Here's the replay file of the said match:
Link!Is there friendly fire in this game?
Afterwards, I had my lock-on on Cirno, and I can shoot her down with Spell Cards, Tension Cards, etc. Fortunately, her AI did not register me as an enemy so she didn't retaliate.
I wasn't able to recreate the event (tried with or without Applocale), so I thought of asking if somebody had the same experience.