Ah yes, the soul crushing, but funny Valiku tramatizing Charon by flying to Ember. But how fast was Valiku? I attemp to awnser in a probably wrong awnser.
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Okay! Valiku flys with charon in 4.3 minuets to ember, excluding a seven minuet walk. for this awnser, we will use the higest cliff in the world, the Nanga Parbat's Rupal Face, which rises approximately 4,600 m, or 15,000 ft, above its base. According to other sources, the highest cliff in the world, about 1,340 m high, is the east face of Great Trango in the Karakoram mountains of northern Pakistan. *From wikipedia* So how fast would valiku have to go? a quick division solves the problem. Valiku goes 811.24 feet a second. But this exchange (The image) shows that valiku could have flown faster, but we'll just stick with a 811 ft per second. No wonder Charon was scared-!