Kristinas was a supporter and a companion of Vytautas the Great, his brother Sigismund Kestutaitis and nephew Casimir Jagiellon, he became the Castellan of Vilnius in 1419.
As a trusted friend and companion to prominent figures like Vytautas the Great, his brother Sigismund Kestutaitis, and nephew Casimir Jagiellon, Kristinas played an important role. His appointment as the Castellan of Vilnius in 1419 highlights this significance.