When I first made this idea I knew what Sam would be, seeing as she was Hannah's best friend I chose mostly a creature that would be near to realted to the Wendigo.

Going off of:

- Cold to the touch

- Near to Undead creature

- Using Humans as a food source

- Ability to survive in cold temperatures. 

- Have a weakness to fire

- Curse like being

Admittedly it might be cliche but it works. Here was that idea.

-

Sam stood off in the back ground listening to the old mans story about Wendigos. She in truth didn't think much of it, but she was very interesting. She tilted her head, listening to his story. Strange part was to the other she looked to be more pale, her eyes didn't waver once. Staring dead at his, not blinking or even moving.

She looked to be in a trance, from Chris perspective staring at their necks, but that could have been just him. Sam didn't say anything as she stared at the other guy, with something that smelled like fire on his back. This didn't sit well with her at all.

"You all need to find some where safe." the older man said, Sam was to busy staring at his weapon. Resisting to urge to growl as a warning when he turned to her.

"Sam?" she heard looking to Mike blankly, her eyes seemed more sunken then before and stared into his very being. It made him want to draw back from her. It was like the look of death in her eyes.

The flamethrower guy narrowed his eyes at her, Sam heard the click of the thing as she looked at him and growled lowly. Her soft hazel eyes turning a dark red color as she glared at the other guy. In her mind she could hear their heart beats, their breathing, the sweet smell of something in their bodies. Sam in truth didn't know why, but she suddenly felt very hungry, and what she was smelling seemed to appeal to her.

Ash was quick to get away from her, as Chris looked unsure, "Sam?" he asked carefully. Sam looked at him with dark red eyes and hissed, showing two long fangs.

"GET BACK!" the older guy said as Sam was quick to get out of the way from the flames she heard about to hit her. She growled at him, suddenly becoming very agressive to her friends, lunging at Mike teeth bared to sink into his neck. 

Until Sam was hit by the older guy as the other two helped Mike up. Who was very confused and scared, what was going on with his friend. Sam hissed at them like a wild animal.

"Go run!" he told them, as he missed Sam again with the fire. Ash and Chris had to drag Mike away as they ran. Sam wanted to follow after, but her mind told her to run and hide, she was no good dead. So she ran through the hall and outside.

Chris told the other's he'd be back as he remember that he and Mike left Josh in the shed. With Sam acting crazy and a monster on the lose he had to get his friend. He ran out, picking up a weapon on the way. The flame thrower guy was looking around for Sam it seemed.

"What are you doing?" Chris asked. He turned to Chris with a glare.

"It would see your friend is possessed by a monster as well." he commented, as he stood with Chris looking around the forest. Before he went off, Chris followed, as along the way he explained what he was doing, and the other was a Wendigo was in more depth

They stopped hearing something when they came up the shed, "We need to go now." said the older guy.

Chris stared at him, "Josh could still be alive, and Sam is-" he was cut off.

"First off. A Wendigo will render you immobile and then they strip  the skin off your body piece by piece. And as for your friend," he looked around, "She's a monster of a different kind, the ones that drink your blood."

As they went to move on, Chris heard a shriek, but also heard a soft growl. Looking to see from the corner of his eye Sam watching them from a distance. He made the mistake of moving, as something ran out of the woods and decapitated the flame thrower guy.

Chris didn't get a chance to react some something blurred out and pinning him to the ground, Sam.

She stared into his eyes with her red ones. He heard again the shriek. Chris took a shaky breath as something was behind Sam, but ti didn't move. Sam was breathing with a heavy growl in each exhale. Her eyes seemed conflicted as this bony claw hand gripped her shoulder lightly. Grayish pale skin on the claws, as there was a soft chittering sound.

Sam then growled as she moved quickly, Chris didn't have time as fangs sank in his neck. And then nothing, as he rapidly drained of his blood. Death took him to quickly.

-

So yeah that's my idea, what do you think?