- Not to be confused with Councilman Sleet.
Slate is described as an old woman with spiky gray hair and a leathery face.
Being a former mayor of Tuff, Slate is highly respected as a leader and a trusted friend, to the point where she is admired and seen as a strong example of leadership by the Huntress-in-training, Coco Adel.
Being from the kingdom of Vacuo, Slate strongly follows a survival-of-the-fittest mentality, as seen with most Vacuans. She also appears to be amicable, holding no ill will towards her allies when she was left to fight off mole crabs as they traveled.
When Team CFVY received a distress call from Gossan, they encountered a cast of mole crabs attacking Slate and her caravan, which had been abandoned by the rest of the nomadic tribe she was leading after the settlement had been ravaged by the Grimm. The Huntsmen rescued Slate, and, as a thanks, the former mayor of Tuff helped the group to the oasis-settlement Feldspar, and introduced them to Carmine Esclados and Bertilak Celadon.
Following a Grimm attack in Feldspar, Slate, along with the various Huntsmen, decided to aid the nomadic tribes headed towards Coquina in search of safety from the desert. However, the group was temporarily intercepted by a ploy Carmine and Bertilak were planning with the intent of trafficking August and Edward Caspian due to their powerful Semblances. The two Huntsmen were detained by team CFVY, and Slate, along with the nomadic tribes, reached their destination safely.
- "Slate" is a shade of gray as well as a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism.