Meep, I love Victoire, so, so much. I think it's often hard for people to make Victoire likable, although I'm not entirely sure why, and I think she can get mistreated in fanfic quite a lot, but I just love this one so much! She seems so cool and independent and a wee bit haughty, but in the most lovable way. It's really interesting reading from her perspective - I feel like I say this to everyone, but I find first-person perspective super hard, it always seems so clunky whenever I write it, but, hey. You nailed it. Her character and personality shines through, and she's hugely vivid and likable.
I could basically wax lyrical about Teddy, as well - I've only just encountered him (well, since the prologue...) and I'm already swooning over him. He's just fantastic, and I love how he's Victoire's best mate - I genuinely thought, upon reading the prologue, that he and Victoire would be a couple, so it's quite refreshing to see them as merely best mates and a writer/photographer duo.
I'm not entirely certain if I like Rob or not quite yet, but, as you've done with all of the other characters, you've written him really well - and I suppose there's something quite endearing about him! The relationship you've portrayed between him and Victoire is cool, as well - it's not just shown as sunshine and roses, and they can be snarky to each other, but it's obvious there's genuine affection on both sides, which is a really realistic portrayal.
And they're off, now - I love how you've jumped right into the action, and the plot, and I'm just mega excited for what's coming next.