I thought for the kiteboard it would be best to sail past it, slow down just enough to grab it and keep planing?
For a person I think the priority is them not your gear so I would ditch your rig and lay them on your board and tow / paddle in. If it was the floaty ring girl you could probably lay her on the board, then you lie on top of her and paddle

Your rig can be brought in by another sailor.
method: they slide your rig upside down through their boom on the leeward side (top side if they are about to waterstart) and tie mast head to your mast bast with the downhaul excess rope.
Easier if you have your already detached board under the tip of their mast, or you sit on your board and hold their mats tip in your lap, to help float it whilst all this is going on.
They can then waterstart and you're all away.
As soon as they have ditched your rig on shore, they can sail back out and tow you off their back footstrap.