Comparatively charming character hoping to find water? (7)
I believe the answer is:
diviner
I believe this is a double definition.
'comparatively charming' is the first definition.
(more divine)
'character hoping to find water?' is the second definition.
(as in divining for water)
(Other definitions for diviner that I've seen before include "one conjectures" , "even more delightful" , "He finds water" , "A soothsayer" , "Expert at finding liquid assets" .)