Erika Mann's brother and Thomas Mann's son. In 1949, he contacts Erika from Cannes to voice his disillusionment with contemporary art and his own writing. He declines their invitation to join the family trip and is subsequently found dead in his Cannes apartment after committing suicide.
No established relationship exists between these two characters in the narrative.
Thomas is the biological father of Klaus, though their relationship is marked by emotional distance and eventual tragedy.
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