My headcanon:
- After the events of IYHSB when my Lavellan walks through the snowstorm and finally being found by the Inquisition, she fell on her knees. Eyes flutter then closes. Her senses being numb from the pain and severe cold. Before her body completely colapse on the ground, she could feel a firm hold over her arm breaking the fall, preventing her face from hitting the snow. She could feel being secured against a matal plate.'Cassandra,' she thought with a smile and her consciousness fades. Friends. They did not abandon her.
... Only to learn later in Skyhold that it was Cullen who breaks her fall and carry her back to camp
- My Quizzy cannot handle liquor (she 'gracefully' decided to be a ****** of a snob by telling herself that passing out on alcohol is a hunter's luxury

as First, she doesnt have time for that

) And when IB offers her a tankard after their first dragon slaying, she was out cold in first strike, waking up 3 days later..
- always imagined that Cullen, Blackwall and IB as good friends (things get rocky near the end game, but their friendship got patched in tresspasser)
- tuesdays are bake days with Sera
- the main reason why she didn't drink for the well is not because she thought that the Inquisitor's mind should be free from 'influence', but because she chickened out. The raw truth about her person is now before her eyes. She choses to ensure a 'safer path' and be with Cullen over the Ancient Knowledge (and whatever risk it may cause later) .. But no one has to know her
real reason, right?

- After the reveal, Blackwall ditch his GW design and wear the Inquisition insignia on his armor instead. He is an Inquisition man now, after she pardoned him and allow him to make amends.
- Wyvern/Lurker hunt, once a year, just to make Divine Seeker, er, Victoria happy, blow some steam and talk about the good ol' days. She looks happier in armor anyway.
... wow..never realize I have so many head canons O.o' sorry for the wall of text..