I went back to do further testing with FM Hisui's 4B. I did these tests against another FM Hisui...
This is on Ver. A btw.
*Her 4b Water Can can be held for up to 2 seconds.
-Up to 5 ticks of meter draining can be done within the 2 seconds, assuming that the opponent feels like getting soaked for that long.
-Each tick removes 15% of meter and takes away a small amount of the opponents life, regardless of if they're blocking or not.
-The watercan can be chained after a standing/crouching B
-You can't kill with the watercan alone.
*Only the 1st tick can trip the opponent and only if they're standing.
-Tripping with the water can does not grant the opponent any meter.
-Holding B after tripping with the can will grant up to 2 ticks before they get up. This means up to 3 ticks can be obtained with this method.
-An opponent tripped with the watercan can be OTG'd.
*It is possible to do 1 tick of watercan after a standing throw (hold back after her throw for about 1/2 a seconds and then use the water can.)
I also played around further and found out that her special moves, excluding her stuff-fu and (i think) her chair, can be empty canceled into her EX's and her Last Arc. This also includes her multi-satchel in the ground and air, though the only move you can cancel into in the air is her EX multi-satchel.
Hope you guys found this interesting.