State 13 - Ice
A character in a frame with state: 13 can be hit by his/her teammates. The character will fall down after getting punched just once, but landing on the floor will damage him/her by 10 hp. Also, when the ice breaks, the broken ice shards will appear.
Technical note
Ice, State: 13 has no innate state machine, although it alters the reaction frame when attacked by an itr.
There also seems to be a threshold for ice characters to not break if he lands on ground with too small x-axis and y-axis velocity.