What product should I sell to which of these characters??? SOOOO lostt :/?

That sounds like alot of fun! Well for me at least. Since Beowulf is a "manly" tough character, you should try to sell him some extra duty deodorant or something. Oh and for Grendel's mom, well, she's a mom. You can always do something with that! She must love her little monster kid Grendel.