Thanks for your query,
As your child is having fever for 3 days and she is having asthma
and kawasaki disease
I suggest you to get her examined by pediatrician
for proper management.She may need some basic investigations like CBC,CRP,x ray chest.
In the meantime give tylenol
as per dosage,give plenty of fluids,do tepid sponging in case fever rises .
Wishing your child good health.