|Appears In||Bloodborne: The Healing Thirst|
|Click to see. Contain spoiler|
Alfredius is a scientist and doctor in Yharnam. When Ashen Blood struck Old Yharnam, he started studying its pattern. Later on, he teamed up with Priest Clement, a Healing Church member to uncover the disease origins.
They started exchanging samples and knowledge revolving the disease and its origins, and eventually become good friends.
When Mathilde, a neighbour and good friend of Alfredius succumbed to Ashen Blood, he nursed her and even went as far as using the Old Blood given to him by Clement to treat her disease. Alfredius also tested Old Blood on himself on small doses for weeks, believing Old Blood, if applied low and infrequent enough, would heal the disease and the beastly curse would not manifest.