Merlyn Temple, Caleb's sister, returns as a ghost/angel to look after Caleb. She wants Lucas Buck to pay for all his crimes and won't rest until she succeeds. description from www.scifi.com/americangothic/residents.html
Merlyn seems very nice, such a shame she had to die, mercilessly killed by Buck. Lets hope she manages to keep Caleb away from his clutches.