The aging father of Tom and Niek who suffers from dementia. He occasionally believes he is Sinterklaas and wanders the roof searching for his horse. He ultimately appears dressed as Sinterklaas to urge his sons to reconcile with their loved ones.
Niek sr. is Tom's aging father and the founder of the family-centered operation.
Tom and Niek manage the clothing rental service and Sinterklaas headquarters of their father, Niek sr.
Niek sr. remains an influential father figure in Niek's life.
The brothers are described as managing their father's Sinterklaas headquarters, and Niek sr. later reprimands both sons.
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