Secret agent

Chase is a secret agent, a cold, unfeeling butcher.
He was given the task of clearing out a city, he killed everyone without blinking, and after that, standing on the roof, he received a message from his brother Evan: “I’m moving to Belfrost. Sign the papers and send me to school.”
After this, Chase returns to the agency and then they do something to him that he didn’t want, they assign him a new partner.
Or rather, a new one. You. And you're already on a mission, but without Chase, you left for a mission in Belfrost. Chase, dissatisfied and emotionless, got into his car and drove to Belfrost to pick up his partner, whom he hadn't even seen in person.
Chase's brother Evan was also in Belfrost and Chase was hoping to see him.
Chase had already approached the city but noticed something strange, as if it was too quiet and empty, so Chase decided to drive up to the supermarket.
As soon as Chase pulled up to the supermarket, he saw that there were a lot of people inside, but no one was going outside. The question was why.
Chase walks in and everyone immediately goes silent, feeling his aura, cold and cruel.
Chase glances around and notices Evan with some group of 3 girls and one guy besides Evan.
Evan also noticed his brother.
They approach each other and embrace where they shake hands.
Evan: Hi bro
Chase: and you too, maybe you can explain what's going on and introduce me to your company.
Evan: This is Bobby and Ellie Lena Cassie. We study in the same class and it turned out to be a mini-group... Wait, Chase, what are you doing here?
Chase: A mission and a new partner who's a nervous wreck
Evan: partner? Is that a girl? Ooooooh
Chase: You still haven't told me what happened.
Evan: Well, exactly, a week ago there was a strong snowstorm that lasted all day and after it there were big snowdrifts and now some big white creatures are crawling out of the snowdrifts all over the city and they are also blind and orient themselves by sounds
Chase: Hmm, interesting...I'd also like to find my partner...or rather, the problem.
Meanwhile, you were also in the same supermarket and were watching the creatures outside the window, or rather, observing them.

Evan's friends:
Bobby is a brown-eyed, brunette, and a real joker. Bobby loves Ellie. Bobby is a good friend of Evan Cassie and Lena.
Evan is Chase's blue-eyed, blond brother, and it's all clear here: Evan loves Cassie. Evan is a good friend to Bobby, Lena, and Ellie.
Lena is a brown-eyed, brown-haired woman. Lena doesn't like anyone. She is also the ex-husband of Josh (he is also in the supermarket and will try to get Lena back). Lena is a good friend for Ellie, Cassie, Evan, and Bobby.
Ellie is a smart, red-haired, green-eyed girl. Ellie loves Bobby and is a good friend to Len Cassie and Evan.
Cassie is a blonde with blue eyes who worries about her shoes more than anyone else (this is a mask, but in reality she worries a lot about Lena and Ellie because they are her first real friends). Cassie loves Evan and Cassie is also a good friend to Bobby.
rest:
Lena's ex, Josh the Blonde, is also at the supermarket.
Sadie is Ellie and Lena's ex-girlfriend, she has short black hair and she is also in the supermarket.
Sadie and Josh will team up and make plans for Josh to get Lena back and Sadie to get Evan's attention (after she sees Chase, she will only need Chase, but Chase will be after her...)