Guillaume is the lord of neighbouring manor. He got the whole manor through a very convenient marriage. Guillaume came to Quillan as a wedding guest and would like to make better acquaintance with de Quillan family. Maybe even become friends?
No good tree bears bad fruit, nor does a bad tree bear good fruit. Each tree is recognized by its own fruit. People do not pick figs from thornbushes, or grapes from briers. Luke 6:43-44