As a disclaimer, I do not remember who York is. But I will try my best to help you out!
Describe each
Lewis-Adventurous, oldest of the duo, leader personality, had his one problems (depression, emotions) but was a great explorer
Clark- Younger than Lewis, a great mapmaker, happy outlook (he had a good life after the expedition)
Sacajawea - Curious, a leader in her own after being a follower, a great taste for adventure. Bold.
Roles in the journey-
Lewis- Lewis and Clark both led the mission but Lewis was more the leader type
Clark-Clark was the mapmaker and studied the land and maps, he always knew what direction they needed to go.
Sacajawea- Assisted the men when needed, cooked and carried things with them while hiking. (Remember that story where she grabbed the crates, saving the guys' hides cause of all the equipment? Yeah, she was important.)
Feelings toward the trip-
Lewis, Lewis had a taste for adventure and was willing to lead and follow through a mission (but like I said, he struggles with his emotions and other stuff)
Clark-Clark was excited because of his bond with President Jefferson and he got to use his map skills.
Sacajawea- Not sure how she was at first but she was no stranger to being far from home, she was a very strong and willing soul.
Interacted with others
Lewis- As far as I know, Lewis and Clark were good friends, they might have bickered from time to time but they were friends through it all.
Sacajawea- She became friends with the men and they valued her in her aiding of the trip.
That's about all i have to offer, I hope I helped you in any way. I'm sorry I couldn't answer about York, I don't remember much. best of luck! xx