This document explains the various functions of the Mizuoto Sui ghost. This does not cover all the basic functions of SSP across all ghosts.
Upon first startup, Sui will prompt you to confirm your name in SSP's preferences so she can use it.
Double left clicking on Sui will open a menu, from which you may choose a function:
The Extras menu also includes:
From the double click menu, select "Talk to Sui".
Here, you can input a number of phrases that Sui may or may not respond to.
Some keywords may increase Tomodachi Points.
If there is another ghost present via "Call Ghost": From the double click menu, select "Talk to another Ghost".
Select whether the other ghost recognizes English or Japanese.
Selecting "Part-time job" in the menu will start a 60 minute timer, after which you will receive 2000 Nyaa, a currency only used with Sui and used to buy her gifts to increase Tomodachi Points.
Certain actions and keywords, as well as leaving Sui running, will increase Tomodachi Points, a measure of closeness with Sui.
Actions include:
Make sure to note what Sui states she likes occasionally so you don't give her the wrong things and lose Tomodachi Points!
Eventually, having enough Tomodachi Points will enable additional random speech.
As Sui explains, simply left click on an item in the list to type in a custom item.
Clicking on that item again will allow you to rename it, or leave the input box blank to reset it.
It's painfully basic, and in the future I may construct an improved version of this, with strikeout text and whatnot.