Klara Sesemann is the daughter of Mr. Sesemann from Frankfurt and later she become's one of heidi's best friend.

Klara is a 12 year old girl who is regarded as an invalid and could only move around with a wheelchair, but later in the series she was able to stand up for the very first time because she got scared of a cow that was coming near her while she was reading a book with her grandmother. After a while she able to walk little by little with the help of Heidi and the others.