Hatter/Carroll in Wonderland

The Hatter (帽子屋さん Bōshiyasan) is a minor character in Carroll in Wonderland.

Timeline
In general, Hatter can be found in Castle Gate each day, accompanied by Nekomata.

Day 1
Hatter is in Castle Gate from 10:00 to 19:00.

Day 2
Hatter is in Castle Gate from 10:00 to 14:00.

Day 3
Hatter is in Castle Gate from 14:00 to 17:29.

Presents
The Old Hat (obtained after meeting Lilith on Day 1) can be given to her and causes her to give you the Small Key in return.