Charisma
Science
Stealth
Engineering
Psionic
Sabotage
Survival
Culture
and like in the first game, some characters will begin with higher value/specialized in one field. Like Rumi obviously in Psionic, and so on. Differently from the first game there won't be big values 0-200, more like 1-20 or perhaps even smaller like 1-10. Then in the main plot there will be skill checks, but not % based (which inevitably leads to save scumming!) but more like Cursed Lands where there's a minimum value to pass the check.
Regarding combat skills, I am planning to have like 4 skills for each of the 4 classes = 16 class skills
Then, each character will have another 4 skills, unique to each one. There will be 9 characters (Lisa/Joshua included) = 36 more skills, 4 unique for each character
So not that many, but still more than the first game which had 12 skills total (both combat and non combat) shared with all characters

I'll be working on defining the skills and building a prototype in the next months to test the battles and get feedback.