Lilo had a plastic head like Goofy, Mickey and Minnie if that's what "face" character means. She looked like she just stepped out of the movie. We didn't stop for a picture at AK because my daughter was having a complete meltdown from being overtired.
She did have her picture taken with Stitch at MGM and he was quite funny. He had a few antics with the security guard and did a few silly things to the children that came up for pictures. We had to wait about 15 minutes in line but it was worth it. He was in the animation building between the Ariel show and Playhouse Disney. We didn't see Lilo at MGM but the sign indicated she was there. I don't know if they are usually together or seperate.
They were together at AK for a long time. We passed them several times over a two hour period and they were always there. They were on the corner as you turn on the path to head towards Camp Minnie Mickey. That was three weeks ago so maybe it hasn't changed much. Hope this helps.