Moving sideways to the perceived incoming direction of the arrow will result in the Corrupted Pawn missing their mark.
Alternatively - get behind cover immediately
A Magick Archer's Hunter Bolt will target all ten bolts on the victim, typically the Arisen. With low Magick Defense this may be problematic, but not necessarily immediately fatal.
Corrupted Pawn Chatter
"Your command... please..."
"I'll waver... no more..."
"To be... by your side once more, Arisen..."
"This pawn... swore eternal fealty..."
"Your command... compels me here..."
There are also some Corrupted Pawns found in the Chamber of Lament in the Everfall - turned and brought to fight against the Arisen for the Ur-Dragon - these pawns act similarly to possessed pawns, but cannot be cured.
Many wear clothing and equipment which are described as "beyond the rift"; for example the Dragon's Pain and Savage Fang, which suggests that Bitterblack Isle has drawn Arisen from beyond the world of Gransys.
As Barroch states: "Three score guesses in and not once have I hit the mark", implies that at least sixty Arisens have perished in Bitterblack Isle, with the possibility of there being many more - each of these would have left a lost pawn behind.
Much of the pawn stat data was sourced from Dragon's Dogma-ドラゴンズドグマ＆Dark Arisen@攻略＆情報まとめWiki (Japanese), subpage : 敵対NPC (Hostile NPC)