Grapnel Launcher:
A Skywarden with a Grapnel
Launcher can fire it at the end of their shooting
phase, after all other shooting has been resolved.
Choose a terrain feature or a unit – friend or
foe – with a Wounds characteristic of 10 or more
within 24" and roll a dice. On a roll of 4 or more
the grapnel has snagged on the target; immediately
move this unit of Skywardens any distance directly
towards the target. They must finish their move
more than 3" from enemy models.
Keyword: directly (towards the target)
Meaning the most direct and shortest possible distance. So no moving behind or to the side.
You can move more than the 24" though, because the range is measured from the model with the Grapnel Launcher, but he could have a conga line behind him. Important rule part for this: move this unit of Skywardens
any distance