Tyland Lannister
Jason's twin and the smarter ledger: master of ships, then of coin — the man who quietly quartered the crown's gold so no one claimant could seize it all. Wars are won by such bookkeeping.
A soul of House Lannister, born at Casterly Rock, sworn to The Greens — the King's Party.
The fuller tale
Season Two
In The Queen Who Ever Was — Wins a fleet with statecraft and a mud-wrestling match. In Essos, Tyland Lannister wins the Triarchy's ninety ships for the greens — Admiral Lohar's fleet will sail to break the blockade.
Where they stand. The Stepstones.
Their story
Jason's twin and, by wide agreement, the sharper of the two — where Jason leads with gallantry and self-assurance, Tyland leads with ledgers, becoming master of ships and later master of coin in a series of appointments that put him considerably closer to the war's actual machinery than his brother's more glamorous field command ever gets him.
His most consequential contribution to the greens' cause is quiet and unglamorous in exactly the way that suits him: he quietly divides and secures the crown's gold across multiple locations, ensuring that no single claimant, however successful a raid or a siege, can simply seize the entire treasury and end the war's financial dimension in one stroke.
Wars, the histories note approvingly of Tyland's contribution, are won as often by such careful bookkeeping as by any battlefield — a lesson his more flamboyant twin never quite absorbs, and one that keeps Tyland relevant to the greens' cause through stretches of the war that consume considerably more dramatic figures around him.
How it ends for them
The chronicle records no death for this soul — they are living when the tale leaves them, or their ending is a page the maesters have yet to turn.
Their chapters, book by book
Where the page and the screen part
Tyland's financial maneuvering is covered in far greater specific detail in Fire & Blood than in the show's currently aired seasons, which have not yet reached the stage of the war where his stewardship of the treasury becomes narratively central.
Their journey
Where the two tellings send them to the same place the road runs whole; where they part, the screen keeps the left and the books the right.