These two NPCs offer a choice of whom to send to Oedon Chapel for safety. Your choice has consequences for their questlines and available items.
Arianna's Questline:
- Yahar'gul, Unseen Village (early): Find Arianna in a window in the lower part of Yahar'gul (before Rom). Send her to Oedon Chapel.
- Oedon Chapel: After each major boss, talk to Arianna. She will give you Arianna's Shoes and Blood of Arianna.
- After Mergo's Wet Nurse: Find Arianna in the sewers below Oedon Chapel. She will have given birth to a Celestial Larva. Kill it to obtain a One Third of Umbilical Cord.
Adella's Questline:
- Yahar'gul, Unseen Village (early): Find Adella in a cell in the lower part of Yahar'gul. You must be wearing a Church outfit (e.g., White Church Set) to talk to her. Send her to Oedon Chapel.
- Oedon Chapel: After each major boss, talk to Adella. She will give you Blood of Adella.
- After Mergo's Wet Nurse: Adella will become hostile if you've taken too much of Arianna's blood.
Note: You can only send one of them to Oedon Chapel. Sending both will result in one of them dying.