Perhaps Avuncular. https://www.collinsdictionary.com/dictionary/english/avuncular
Avuncular (əvʌŋkjʊləʳ) adjective [usually ADJECTIVE noun]: An avuncular man or a man with avuncular behaviour is friendly and helpful towards someone younger.
avuncular (əvʌŋkjʊləʳ ) adjective [usually ADJECTIVE noun] An avuncular man or a man with avuncular behaviour is friendly and helpful towards someone younger.[Collins English dictionary]
