The reason he's trying to get it off is because he knows that Kira gave it too him and she is something from the underworld obviously and he doesn't want his life to change.
"F-For you, erm..thank you for w-watching him..hehe.."
"No problem dear..and thank you.."
He smiled and started walking and pushed the orb off his lap.
"Get off, I have a kid in my hand!"