User blog comment:Skuldomg88/Extracting gift information from the game/@comment-2194058-20180625210946/@comment-35937527-20180625221110

Thank you for the insights! From some initial testing it seems that only values that correspond to items actually in the character's TagID_xxx list affect anything. So even though in Arlo's Favor_Excellent it says 304_30, none of these items (Toy Robot, Fossil Replica or Hospital Bed have Tag_List value of 304) will yield +30 relationship with him.