Your character will be staying! You may use whatever excuse you'd like to have them stay (that they asked to be allowed to stay, or saw others planning to and joined in, etc), and they would have known before everyone else returned to Oska that they would be staying. They will be there a total of 3 months in Nalawi time, and will return to Oska slightly late or very late to the party (or missing it altogether), whichever you prefer.

There will not be a log for this, but you are welcome to plan with the other characters staying if you would like.