- LaCher Siffright
- Isabel Kabra
- Jake Rosenbloom
- Damien Vesper III (on the card as Dave Speminer)
- Beatrice Cahill
- Arthur Trent
To oversee all Vesper activities on Vesper One. Vesper One's identity must be kept a secret to those outside the Vesper Council of Six, in order to prevent treachery.
Vesper Two also handles all disciplinary issues, and oversees operations and plan missions.
Communication skills, ruthlessness, and a talent for torture.
- She believes that Dan can be turned, though Vesper One seems to disagree.
- Vesper Two first appears in A King's Ransom observing Dan collecting Clues.
- She has ties to Dan, as mentioned in A King's Ransom.
- She wants to overthrow Vesper One, and become Vesper One herself.
- She hates animals.
- She also drinks the Master Serum that Dan Cahill created.