Here is the full list of all 32 Winged Sakura: Mindy's Arc achievements.
Completed Chapter 3
Equipped 8 Weapons
Equipped 8 Weapons and 8 Accessories
Unlocked 8 Spirits
Completed Chapter 2
Learned ten crafting recipes
Completed Chapter 1
Obtained ten Data Fragments
Enchanted an item to level 10
Cleared a level on Insane Mode
Bought your first bag
Enchanted your first item
Obtained a Data Fragment
Cleared a level without losing a life
Completed the tutorial
Equipped 1 item
Unlocked all Cherry Blossoms
Cleared the game
Unlocked all Spirits
Obtained 100% on all Entrances
Reached level 99
All Spirits leveled up to 99
Crafted your first item
Crafted a SSS tier item
Enchanted a SSS tier item to level 10
Bought ten bags
Completed waves 1-30 on Survival Mode
Completed waves 31-75 on Survival Mode
Completed waves 76-120 on Survival Mode
Completed Chapter 4
Saw the ending