Arcana Heart 3

Fiona has 3 moves with the word "Sacred" in it, the one mentioned in the previous solution is the only one that doesn't require you to use any of your Arcana Gauge, but there is a simpler way of doing it

Set Versus to infinite time, 5 rounds and start a game of Fiona vs Catherine (I used Catherine cos she's so big making her hard to miss) and select simple.

Once the fight start keep spamming down and B (medium hit), the first 2 hits have to hit the oppenent (this is why I pick Catherine), the 3rd down B makes Fiona fly up into the air and then you just hit any buitton and she swings, you don't need to make contact with the opponent for it to count, if you do make contact it will take a lot of health off your opponent hence why it's best to have more rounds so you can do it in one match

I got the cheev with making contact about once in every ten attempts and cheev popped for me when I missed about 5 in a row so you definitely don't need to time it perfectly and make contact

I hope this helps any one looking for the cheev:)

This one is a lot easier than it seems. I highly recommend doing Sacred Bringer, which is the easiest follow-up move (just press A, B or C) after (numpad format) 236A, 236B and 236C. Push your opponent to any corner of the stage and input 236A followed immediately by 236B. Input 236C on the wall bounce caused by the 236B, then wait for the opponent to fly over to you and hit A, B or C BEFORE Fiona raises her sword horizontally.

There is a way to get a perfect slash that does tons of damage if you hit the exact right frame, but that isn't necessary for this achievement. "Whiffs" (failed slashes that hit the opponent but could never kill her) also count towards this! I also highly doubt that you actually need 100 as I'm pretty sure it unlocked earlier for me.