N'orr Cott (Earth-Prime)

"You remind me of a colleague I once had on Mars called N'orr Cott. We were a team. Every time I put criminals away, she would always stand guard in case of a surprise escape or an ambush. She had patience, courage and commitment, just like you. We called her Sentinel. I want to show you something."

- J'onn on N'orr Cott

N'orr Cott, better known as Sentinel was a member of the Martian Police and a former colleague of J'onn J'onzz.

Colleagues
At some point, N'orr Cott became a member of Martian Police and worked with J'onn J'onzz. They then became a team and she stood guard every time J'onn put criminals away.

Mantle
In mid-2021, J'onn gave the mantle of Sentinel to Alex Danvers, who reminded him of N'orr, and placed the Sentinel emblem on the Tower.