By Characters:

Aoi:
// Keeper of Aoi's gum
// Keeper of Aoi's toy gun
// Keeper of Aoi's laptop
// Keeper of Aoi's hair gel
// Keeper of Aoi's insanity
// Keeper of Aoi's juice box
// Keeper of Aoi's school jacket
// Keeper of Aoi's underpants
// Keeper of Aoi's knife
// Keeper of Aoi's               headphones
// Keeper of Aoi's apron
// Keeper of Aoi's boiling pot // Keeper of Aoi's mittens
// Keeper of Aoi's          hacker skills
// Keeper of Aoi's          earrings
// Keeper of Aoi's intelligence
// Keeper of Aoi's heart
// Keeper of Aoi's tracker
// Keeper of Aoi's              vidcam

Arisa:
// Keeper of Arisa's money

Erika:
// Keeper of Erika's               underwear
// Keeper of Erika's                 engagement ring

Kouki:
// Keeper of Kouki's               wish to be his own person
// Keeper of Kouki's               smile
// Keeper of Kouki's               secret garden
// Keeper of Kouki's               dandelion
// Keeper of Kouki's              heart
// Keeper of Kouki's              laugh
// Keeper of Kouki's                school uniform
// Keeper of Kouki's              secret
// Keeper of Kouki's              trowel
// Keeper of Kouki's              hanky

Poplar:
// Keeper of Poplar's          bathtub
// Keeper of Poplar's               food dish

Ogata:
// Keeper of Ogata's                 wallet

Saionji:
// Keeper of Saionji's              binoculars

Tanpopo:
// Keeper of Tanpopo's spade
// Keeper of Tanpopo's               bike
// Keeper of Tanpopo's               school uniform
// Keeper of                     Tanpopo's leftover                     dandelion fluff
// Keeper of Tanpopo's          smile
// Keeper of Tanpopo's                potted Dandelion
// Keeper of Tanpopo's              tears
// Keeper of Tanpopo's               broken bottle
// Keeper of Tanpopo's               rose petals
// Keeper of Tanpopo's               genki-ness
// Keeper of Tanpopo's               bra

Youji:
// Keeper of Youji's heart
// Keeper of Youji's camera
// Keeper of Youji's jacket
// Keeper of Youji's sweater
// Keeper of Youji's               right hook
// Keeper of Youji's smile
// Keeper of Youji's                 photo album
// Keeper of Youji's              polaroid