Sinclair Avery (b. 1998) attended Hogwarts School of Witchcraft and Wizardry from 2009 to 2016, and was sorted into Slytherin.
He is a member of the Avery family, a pureblood wizarding family. His father, and grandfather, were both Death Eaters and were both sent to Azakaban. He doesn't have his family's beliefs and doesn't hold any grudges against the people who sent his family to prison.