Michael: A copy of Tea and a teapot with aztec design
Chris: bolo tie-locket (birthday), galaxy pants and the literature to help out with Haruto's joint secret gift
Ryoga: A copy of Uglier Than a Monkey's Armpit: Untranslatable Insults, Put-Downs, and Curses from Around the World
Rio: tasteful hairclip
Haruto: Joint secret gift with Michael
Kaito: Starter kit of helpful tools to help care for Haruto's joint secret gift
Shingetsu-kun/Vector: orange scarf (carefully chosen so that it won't clash with his hair) and a set of four flyswatters

Mami (secret santa): the smaller one of these