She was, as she herself writes in the student book from the 25th anniversary (1916), a typical, genuine Bergen resident, and remained associated with her hometown all her life.
Through her half-brother Jørgen Brunchorst, however, she entered the circle around Bergens Museum, where the doctor Klaus Hanssen played a major role.
For the sake of her private medical practice, she had to resign from this post as early as 1912, but she remained a faithful employee of the association all her life.
The group that she (according to her own words in the student book) included with particular interest and love, were the streaks - the hard-working and then poor people who lived by fishing in Øygarden west of Bergen.
The Dethloffs had acquired a summer house there, which at the time was quite unusual, and initiated a number of welfare measures for the local population, who in gratitude erected a bauta over them on Rong in Øygarden.