|The Black Diamond|
|Full name:||Ezekiel Sáenz|
|Born:||28th November 2035|
|Residence:|| I Cohort, Section 3|
I Cohort, Section 4
|Clairvoyance type:||Fury: Unreadable|
|Siblings:||Nadine Arnett (half-sister)|
|Organization:||The Seven Seals|
|Allies:||The Seven Seals|
|Enemies:||The Devil's Acre|
|Allegiance:||The Seven Seals|
|First appearance:||The Bone Season|
Ezekiel "Zeke" Sáenz (28th November 2035 - ) also known as the Black Diamond, is a member of Jaxon Hall's clairvoyant gang, the Seven Seals. He is an unreadable, a rare type of clairvoyant. He is the older half-sibling of Nadine Arnett and in his twenties.
Little is known of Zeke's life prior to joining the Seven Seals. He was born in Mexico, but at some point moved away to live with his half-sister, a fellow clairvoyant, in the United States. In 2057, he travelled to the Scion Citadel of London with her on a college trip to find out more about the Scion system. After the pair were approached by Jaxon Hall, they elected to remain in the citadel to learn more about their clairvoyance.
Zeke is slim, with brittle wrists and tanned skin. He has eyes the colour of black tea and a thin, restive face. Above his brow, there is a vertical scar.