The Three
As Bannor begins his movement, a tawn-and-rust body sails out from beyond the cliff edge and glides down to land in the plain, about ten feet from where he stood a moment before. Landing with its rump toward its former hiding face, it quickly whirls to face its intended victim, only to find him making tracks away from it toward the same bushes in which Annaliese and Ashur are effectively concealed.
The beast which has revealed itself has a long, low leonine body, except at its rear end, which rises awkwardly upon two black-furred legs ending in cloven hooves, whose upright position holds the creature's hips nearly twice as high as its shoulders. Such awkwardness doesn't seem to bother it much, however. A stripe of reptilian scales in a bright vermillion hue covers the beast's long, lashing tail, spreads out across its recurved spine, flares into the broad wings which carried it down from its perch, and continues up to the nape, where it suddenly curves to the right (from his own perspective, meaning it's on the left side of the body from your viewpoint) and emerges from the monster's front flank, as the long flexible neck and dragon-like head which peeked at Bannor a moment before. Just to the right of this weirdly misplaced visage, the head of a lion hangs from the front of the monstrosity's body, its eyes glazed and motionless, its tongue lolling limply from a mouth slackly agape.
A rune-studded metallic harness, obviously forged by the same smith as the chain, surrounds both the base of the snaky dragon head and the clearly-broken neck of the lion head, while a third opening frames a massive scab still framed with a few ribbons of torn flesh. Six lengths of chain hang loosely from various points on the sturdy yoke, two of them ending at a heavy iron ring which presumably connected all of them, as well as the broken end link of the chain around the rock. The apparatus was clearly designed specifically for this creature, and is robust-looking enough that it ought never to have broken; somehow, the chimera was able to exceed the usual limits of its strength and tear free, but not before snapping one of its own necks and completely severing another head in the struggle. Only the reptilian head survived, specifically because it emerges from the body at such an unnatural angle that it escaped the strain of breaking free.
Bannor, your flight to freedom was effectively during the same surprise round in which the monster moved into view. So you get to act again, after which Ashur and Annaliese can go, before the chimera gets a turn.
As Bannor streaks clear of its landing site and dives into the brush, vanishing from view with preternatural completeness, the chimera roar-hisses in frustration from its one still-living mouth, its tail lashing angrily behind it. The creature's body has a gaunt look which suggests it's not eating nearly enough to sustain itself, so you doubt it will leave the scrub-bushes alone just because it doesn't know exactly which one Bannor is hiding under.