Milena hasn't seen train crashing, she was sleeping, but noise and stroke woke her up and throwing her body in the wall opposite her. She felt strong pain on her cheek, and after she touched it and looked her palm she saw something dark. Blood. The lights in train blinked a few times than turned of. She had no idea what's happening, the hufflepuff only knew that the train crashed and that they're sinking now.
Cold water rushed through the broken window in her cope compartment, sweating her wardrobe and making her shiver. She shouted her mounth and pulled out her wand just in time to make bubble charm and save herself for drowning.
Mila heared screams in the hole, students asking for help. She prayed that no one dies, although she already knew that was childish, the train fell into the lake, there must be dead students. She waited for a cab to fill with a water completely trying to restrain the hysteria, it won't help her, it would only killed her, and all the people she might save. Milena knew she couldn't open the cab doors if the cab isn't under the water, the pressure was too strong and she was too weak to fight with physics. Adrenalin filled her veins, numbing her pain, in some part of her brain she knew she's full of bruses, her right hand is probably broken, it's luck that she's left-handed, she'll have giant scar on her cheek, it's a wonder that she's even walking considering she was in one of the first wagons.
She open the doors, glancing back to her cab for the last time, she saw her owl, dead in the cage. The blonde completely forgot about her, and now she's dead, because of her, her heart ached but she turned her gaze away and stepped into the hole. Now she need to help the alive ones.
She hasn't know the spell for extensive damage but she knew how to break the windows pretty well, and could help the first years climb up through them and then they need to swim to shore after she jinxed them with bubble charm. In theory, it's pretty simple, but it was much harder in practice. Outside of their cab was some guy, he told them his name is Bastien, who helped pull the kids out and send them away from the lake, somehow. After she helped a few of them her back started hurting, she wasn't strong enough, hopefully some guy from her year saw what's she trying and helped her, together they cleaned all train compartment in their cab and climb through the window, and started swimming to shore.
When she reached the shore the fight was in full swing, Hogwarts was full of people, and most of them weren't professors here, probably someone seeked for help, and people answerd. Milena hoped that there are sufficiently to win. Some of her teacher, she didn't registered which one, pulled her out of battle, forcing her to go into the castle. She let her to drag her, after she seen some werewolves. She hasn't skilled enough to help them.
(OCC. Are werewolves changed? Is full moon now? If it is I need to change Sebastien into werewolf, too. (If someone wants you're free to attack him thinking he's with the bad crowd.))