I noticed some interesting progression in the questions.
Has your characters killed humans? (yes)
Has he lived in the 20th century? (yes)
Is he German?
(From there he directly went to Galland in amazing speed!
)
The second try was even better. All the time it seemed he was searching in the dark, asking more and more vague questions I had to answer no.. and then suddenly he presented the correct answer: Reinhold Messner