Trakan was a Unknown that lived a long time ago, somewhere around the Cathedral of Grey Grace. Together with Okoth Goldbreeze, he participated in the events that led to the civil war between three Halfling factions, in the war itself, and in its aftermath. During the shared vision that occurred during Take Me to Church, the Ashen Hawk was the one seeing through Trakan's eyes. 

Trakan was a Ranger, and a fervent follower of the Sun-in-Shadow, or simply the Shadow, the deity of the Halflings of the Black Banner, aka the Halflings of the Sable.

His father was the Inquisitor also seen in the shared vision, who was bent on purging "corruption, sin and filth" with flames, from all the Halflings, regardless of their faction. Trakan convinced himself that it was necessary, that it was Justice, but even he grew disheartened. 

Inquisitor Sparrowtuft:

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His victims were turned into flaming Unknown called the Combusted