Here is the full list of all 28 My Big Sister achievements.
Not ears.
Doesn't it?
Who doesn't love a good secret!
https://i.imgur.com/8N4cjPZ.png
The book of sorrow.
It was only a matter of time.
Either a pure heart or a demon can survive her meeting.
I'm just...too tired...
...I hope.
Spirals are hard to climb.
Or is it...really me?
The truth in the eyes of a doll.
Opening secret/s
Why do you keep following me?
But not so big and cuddly.
Make sure to eat your vegetables!
Even spirits like noodles!
What a nice demon!
Even if the town is only made of...kids?
For everything...
Was that a smart choice?
Even if it's about a dead fish.
Make sure you check everything!
Isn't she?
Dayfield Motel? Sounds like a nice place.
Was that the right choice?
It's the nice thing to do.
The look delicious!