Anyone halfway familiar with Rochira (or anyone who attempted to sing carols at her door) knows she isn't exactly fond of the holidays. Any holiday, really. But that doesn't mean she's unkind about it (unless you were someone attempting to sing carols at her door).
A golem delivered her presents and if it managed not to attack anyone or go on a rampage, then Wintersday miracles do exist.
To Peter, she sent a box containing various ores and artifacts from her world (all checked thoroughly to make sure he can't release some sort of Orrian-esque curse on his world while studying them). Another box has a large owl griffon's egg nestled safely in a cocoon of silk.
To The Spine, knowing that Peter would never forgive her for gifting a tranquilizer gun, she sent a thick but comfortable leather coat, tailored for his height and size, and dyed with black with rich crimson accents.
To Eros, she sent a quiver's worth of exploding arrows as well as several well-prepared slabs of meat (whether they're for his pets or Eros himself can be decided by Eros himself..)
To Sulen, she sent a collection of dried and fresh herbs and seasonings collected from around Tyria. (She would just pretend they weren't going to be used in cannibalistic pies.)
To Arganti, she sent a large egg of mysterious origin, tucked carefully in a nest of silks. She also sent a box full of healing elixirs, as certainly the sylvari would need them.