The context of the following conversation is Casey always admires their favorite author.  Casey met the author in person.:
Casey says I really like this author because they always have so much to share about themselves.
The friend responds Yeah they usually are great persons..
Casey responds Yes they are.
The friend responds I know they are such an inspiration for you.
Casey responds they most definitely are.  They are great.
The friend responds I know. They are so cool.