Who is The Quagmire Triplets from The Vile Village and what is their importance?

The Quagmire Triplets are the Baudelaire children's best friends. Isabella Quagmire is a poet and Duncan Quagmire is a journalist. Together, the triplets collect information about Count Olaf and the V.F.D., which they record in their trusty notebooks. The Quagmires are always referred to as triplets even though there are only two of them. The third triplet died, but that did not suddenly turn the surviving Quagmires into twins. In this novel, the Quagmire Triplets are the latest victims of Count Olaf's greed. He has kidnapped them and hidden them in Fowl Fountain with the hopes of getting his hands on their fortune. The Vile Village focuses on the Baudelaires' search to find and free their best friends.