The crucible

Other characters reveal that this character is sick, but she is never seen on stage.

a mary warren

ruth

rebecca

sarah

Ruth

Explanation:

Ruth Putman is the only surviving child of Thomas and Ann Putman. The Putmans have already lost seven infants shortly after their births and now Ruth is said to be mysteriously ill. They suspect that their family is being attacked through witchcraft by the vicious villagers who are jealous of their wealth.