Harper
Kieran: A portable, solar-powered recharcher for Mal that's been very well tested. And a prototype that would be powered by their powers... he's probably been quietly bugging Ash about this one. Joint-ish gift perhaps?
Ash: An e-book on programming basics. Anything he's picked up on his scrounging that he thinks Ash would like to tinker with.
Brainy: Report on tesseract science, and his research on the barrier/network.
Watari: A report on interesting things about cyborgs. Possibly another mechanical pet.
Pi: A video-game he programmed himself (the graphics are kinda... mathematically precise but far from appealing. the coding? rocks) And a couple other silly/inane programs he thought she'd find amusing.
Cortana: Some very specially modded weapons. And a robot first aid kit.
KOS-MOS Robot First Aid kit. Specs for tech he thinks she might find interesting/useful.
Robin: A very detailed report of his forays into the network. Things he's recoded, how they were reprogrammed and observations and stuff. Parts of it are sadly corrupted.
Kimiko: doesn't know her well, but! A repair-kit for her mechanical parts and a few interesting tools. Possibly a treatise on his world's tech too, if he thinks she'd be interested.
Faust: An electronic Christmas card. Very cleverly coded with Christmas greetings and a "thank you for healing my ass" message.
...other bots/androids/cyborgs and/or scientists he's met will probably get something small.
BB:
Most people he knows will be getting at least a hand-made card! Cabin-mates will definitely be getting presents (b-but I don't even know who lives in Karaoke cabin anymore uh. help?)
Robin shiny video-game, a card, and vegan cookies.
Etna shiny video-game, a card with a note ("So we can play together :D")
Nodame: her very own superhero sidekick outfit (probably not the best quality, even though he got help with it, but it's the thought that counts? and a card
Jan Something awesome and cool and tiger-themed! And a card, with a "coupon" for a free animal ride through Camp :D
Chii: something impossibly adorable.
Ryuuta something impossibly adorable and/or a video game and/or bubbles.
Doyle:
Wataru: a small book with interesting Irish sayings
Kivat: A book with art, and another book about his world's demons/demonic history
Lassiter: a bottle of good Irish whiskey
Sara: A Celtic cross a lot like his. Because she liked his a lot.
Yozak: a bottle of scotch, single malt of course.
Elphaba: A nice good book. Possibly two.
Mai: A pair of Claddagh rings with a description of what they stand for and a note "For when you find the right man. From Doyle" (Why yes, he does remember the matchmaker incident XD)
Kintaros will be giving everyone poetry. p-possibly that he's composed himself. And also for his friends and canonmates a gift of some sort that has something to do with their name, if at all possible (ie Yuuto and Deneb will be getting star-themed~ gifts. Momo something to do with peaches or thigh warmers and Ryuuta a toy dragon)
Ryoutarou gets copies of Momotarou and Urashimatarou legends, hand copied by Kin, as well as a hand-carved peach and turtle out of wood.
Taiga
Wataru a necklace shaped like the Kiva symbol with "兄弟" (Kyoudai) on the front and "Love Taiga" on the back. And also a couple sets of clothes. With very lovely scarves. ... there is pink involved here, yes.
Otoya (very reluctantly) A watch with "To my stepfather, love your stepson" inscribed on the back. and the Kiva symbol
Kivat (if equally as reluctantly) several prints of paintings of women with long necks (
like these ones)
Nana a very lovely necklace with rose gold, and beads shaped from pearls (pink, naturally), pink coral and rose quartz. the front has a small pendant with an incised carving of a bat (that, well, looks suspiciously like the Kiva symbol)
Husky also a necklace, with primarily silver, lapiz lazuli and blue topaz. The pendant on the front has a carving that resembles fish-scales if you look closely enough. ...and a very small, discrete, Kiva symbol Taiga's not possessive, really
Cooro A necklace to match the others with amethyst, charoite and sugilite. The pendant is shaped like a feather. Kiva symbol is also present. And also a Christmas cake for the three to share.
Ash A stained glass pendant that bears an amazing resemblance to Taiga's soul. Kiva symbol present.
Rue a bracelet. Gold and white gold with inlaid stained glass. And a note of well-wishes for the season and the new year.
Sera a very simple silver bracelet. Kiva symbol is included.
Polly A letter expressing thanks, apology and well-wishes. And an uncut gemstone that somehow bears a startling resemblance to her soul, to those who can tell such things.