Oh my am I hyped about this champ or what. In the trailer, she reflected Thresh's hook back at him. Will she have a reflect ability???? I made a post about this idea not so long ago. https://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/2A2e063J-an-idea-for-a-new-ability
It looked more like Senna put a shield on Lucian that not reflected the hook but deflected it. That same shot that shielded Lucian shot Thresh and knocked him down.
It does appear to reflect the hook. This looks theatrical, perhaps its only a spell shield after all. I predict its an ability that you shoot through an ally, spell shielding them, and it gets additional CC effects when doing so - the shot then stunning an enemy it hits if it continues on.
I don't know if Lucian standing near Senna to stop her from getting absorbed again is theatrical or real once again. It could be a tenacity passive if she stands near an ally? It's a shot in a dark and admittedly boring passive but its possible.
I for one would think itd be really cool if she could attack her allies and heal them when she does so. She's marketed as an ADC/Support, which I mean the only thing that binds ADC together is Crit/Attack speed (depending), so I'd guess her abilities scale with those stats instead of the usual AP, which will be pretty cool.
That means she'll have a bit of damage packed into her autos though will never become truly an ADC since she'll lack gold for the item spikes.
I'm pumped for her, and I think the Marksman Support tag is a lot better to balance than her predecessor that we all looove 
That's her ult. Her lore page offers another hint: She can transform between a Human and a Wraith. That's likely a mobility skill.
She probably has another utility and damage beyond that.
thresh threw out a basic auto, his hook was on cooldown from earlier. yes i "watched" the trailer. senna can put fiora's old parry on people.
I think her abilities will have a second cast. the animation looked like a sheild, and second cast deflected it back to hit thresh. The black smoke threw the hook back at him after the light sheilded thrLucian from it.
