There is no such thing as "ethnically swahili" swahili isnt a ethnicity or anything like it. Barawanis are basically the Latinas of somalia, they are mixture of many settlers around the coast the inhabit (indian,Persian, bantu, somali, arab..etc)Barawani and tunni are 2 different groups, tuuni are somali whilst barawani are ethnically swahili.
Do you mean to say that the hooyo is tunni from baraawe or that she's ethnically swahili ?