What named creators run on Castle, and every option the game allows. Plus the gadget interactions that decide the matchup.
Primary and attachments: NotJoeyBlack's pick. The gadget list is every option the game gives Castle; nobody we read picks between them.
Rainbow Six counters are gadget interactions, rules of the game rather than statistics, so every pairing here comes from the two operators' own kit pages: the mechanism from whoever wins it, the gadget it beats from whoever brings it.
Castle's Armor Panels are meant to force Attackers to spend utility on a door. Glaz's page says the Ots-03 shoots straight through a Castle barricade, so he answers it with the gun he was already carrying.
A Castle Armor Panel is meant to cost the Attackers utility at a door. Ash's M120 CREM Breaching Round takes it off the frame from across the room, at no risk and no approach.
A Castle Armor Panel makes a door loud and slow to open. Amaru does not open it: she hooks a window and arrives through that instead.
Nokk's advantage is arriving unseen and unheard. A Castle Armor Panel cannot be opened quietly, so every entrance it covers makes her announce herself.
Buck's Skeleton Key opens soft surfaces fast, and a UTP1 panel turns a doorway into another surface he has to spend shells and time on.
Castle is a Defender in Rainbow Six Siege.
Rainbow Six's counters are mostly deterministic gadget interactions, rules of the game rather than statistics, so we state them from the two operators' own kit pages with no telemetry needed. A pairing is only written where the winning operator's page names the mechanism, which is why plenty of operators here carry none. Statistical data is based on external APIs and publicly available information. It may differ from official data.
NotJoeyBlack and SINOOS publish loadout picks under their own name, and this page credits each of them rather than averaging them into a single answer. We measure nothing ourselves. The list of what Castle can equip is the game's own, and is separate from anyone's opinion about it. Statistical data is based on external APIs and publicly available information. It may differ from official data.