Prana

Plana (プラナ Purana) is an optional boss in Lust Friend. She comes from a collaboration with the image collection TagtrauM. To encounter her and her sister Citra, you must go to the basement of the Fess Town church, examine the book and input the code "6O1vqI" (found in the image collection).

Profile
''The younger of two succubus sisters, originating from a collaboration with the image collection 『TagtrauM』. She's interested in humans, but not in their culture. She fears dogs because of a time when she was chased around by a dog in the human world.''

Strategy
To befriend Plana, use Pillow Talk followed by "Beg for mercy" 3 times, then Talk followed by "What do you think of Citra?" twice. Alternatively, you can give her a Love Pendant with the Gift skill to get the Friend Flag in 1 turn (note that other gifts are useless).

If you instead wish to defeat her, she is weak to Chest attacks.