It was hinted a few times that Pulchra would be a part of the Sons of Calydon, and it finally happened in Zenless Zone Zero 1.6. However, despite belonging to the Sons of Calydon, Pulchra’s additional ability didn’t synergize fully with her faction and is instead meant for Aftershock DPS, like Soldier 0 - Anby (Silver Soldier Anby). Both units buff the team’s Aftershock DMG while they’re capable of triggering that occurrence themselves.