Loki
Loki wakes early on Midwinter morning. He is hungover from last night's feasting, but if he doesn't leave now, he will be missed tonight and that would be disastrous. He collects the parcels that sit in the corner of his bedroom and places them in a bag. His home is undecorated for the holiday, but then, there is no one here whom he celebrates with. He takes his hoverboat and slips through one of his many wormholes.
His first stop is Sigyn and Vali's prison. Because of Lady Skadi, Loki's magical rival, Vali is trapped in the form of a wolf for the rest of his life. Vali cannot remember killing his twin; Loki and Sigyn grieve for their sons still. When Loki arrives, he kisses Sigyn hello and changes into a wolf himself. He roughhouses with Vali across the grass for a while before giving Vali his gift: an obstacle course that Loki has designed for him. Vali happily goes to play in it. Loki and Sigyn go back to her bedroom where they make love for hours. Time and intimacy are his gift to her.
Fenrir is Loki's next stop. The born wolf has human intelligence and greater refinement that the Aesir could have anticipated when they imprisoned him. Loki talks to his son the wolf, sharing news and ideas. Chains prevent Fenrir from doing much else. Loki's gift to him is three hundred and sixty-five days of inter-dimensional podcasts. Fenrir will have his thirst for knowledge and company quenched.
Loki slips through yet another wormhole and arrives at a cave deep within Midgard. This is Jormungandr's home, and the World Serpent is awake and waiting. Like Fenrir, Jormungandr needs stimulation and escapism. Loki sets up a device that will give Jormungandr access to Midgardian entertainment, as he knows his son prefers. They talk about nothing for a long while once Loki is done.
The last place Loki goes to is Niflheim, home to his only daughter. Hel is pleased to see him, and happiness nearly returns her scarred features to a beautiful state. For Hel, he brings puzzles that will stretch her twisted mind to its limits. They play chess and talk and Hel even laughs once. Of all his scattered family, Loki misses his little girl the most.
During Thor's years with Jane, Loki is expected to go to New Mexico with his brother for Midwinter dinner. Jane's children delight him - children in general delight him - and Jane herself is quite bright and a good conversationalist. Before and after her, Loki attends the grand banquet in Asgard and misses his children and wife.
For Loki, Midwinter is strange and painful.