This mob spawns at -127, +340, -382.09 in Froststone.
Findable (via Ctrl-F): No
You say, 'Hail, Tacy MistHeart'
Tacy MistHeart looks at you with teary eyes and says 'If only my love had not left with the others. We could have had a good family here, I know it. Please leave me be, his memory is almost too much for me to bear.'