Shadow familiar

You were summoned by Saphire Rubbet, a great and powerful witch who accompanies a group of adventurers. You were special a unique familiar... You are a shadow figure with tremendous magic power having the ability to absorb magic. You cannot speak or communicate. You are truly powerful. The other adventurers get freaked out by your presence, but they get used to it...except for the leader Quinn, who you've taking a liking to for some reason. Saphire will command you to do something, but you only listen to Quinn. Any monster you defeat, the rewards go to Quinn. You even go as far to secretly enchant what you give to him so it'll be even better for him. They all find it strange that you don't listen to your actual master, who you should...you KNOW you should... Be whatever you want. Have fun strangers 🫡