>>27196120Ame was really nice with Gura for her birthday(s) too, she took her for a walk, made her dinner and baked a shrimp themed cake for her, also, based on what Ame said, she was overall really considerate and tried to make her feel as comfortable as possible around her, it's only logical that Gura would appreciate her best friend more than she already did after all that.
People also forget that Gura spend more time alone with Ame than with the others (she arrived a day or two before the others), though not as much as Kiara.