After all of this time, the dude still hasn't learned a lesson about map design or taken all of the criticism about his maps into consideration.
The mansion with Enna is so badly designed. There's too many dark corners and some of the doors are nearly invisible because of it. I can't find the last key fragment so I'm just going to give up on progressing with this game for now.
There's obviously a room in one of these dark corners somewhere but I've already ran around the edge of every map, including outside, spamming the Z key. I've defeated Enna close to 10 times just running around trying to find that last fragment. There's a locked door where Vhidna is that I can't figure out how to unlock, either. So I don't know if the last fragment is actually behind that door.
I've found two fragments in the upper floor (office and the bedroom with the lone lamp), the one that is outside, and the one that was in the locked deposit room. I thought that someone here said there was a key fragment in the kitchen through the living room but I'm not seeing any fragment there. And with how buggy this game is, it's sometimes concerning that something might have bugged.