Critique!

She ran through the thick forest, long fiery red hair flying
behind her. There was a giant roar beneath her, and she screamed, sprinting
faster. She glanced behind her briefly, and saw nothing. Then, when she looked
forwards once again, a humongous hand emerged from the ground. She ran into it
blindly, and it grabbed her. She went silent as her lungs were crushed. Still
flailing, her legs went limp, and then the rest of her body. Somewhere else,
there was a yell of agony.

Matt sighed and slipped into Mello’s arms. Her short, cropped blonde hair comforted his skin, lightly tickling his neck.
“I love you, Mello.” He said to his sister, smiling. She smiled and thought of his odd nickname; Mello. Her real name was Melly, but he preferred Mello from the day he was born.
“I love you too, Matt.” She ruffled his reddish hair, and he ran to his room. He returned with orange goggles on, and a striped jacket. She laughed, as he handed her a fake scar.
“Let’s play Criminals!” Matt exclaimed. It was his favorite game to play. Him and Mello were criminals running away from the police, and sometimes Mello owned the mafia if she was feeling greedy. He had thought of it when both had been bored, trying to think of something to play.
“Okay, Matt.” Mello said, taking the scar from him. It had been his Christmas gift last year, because in the game she had been in a explosion. It fit on her face perfectly, and had come with a kit, as the sticky substance wore off quckly. Mello walked into the bathroom and applied some sticky stuff on the back, positioning it on her face. She slipped on a sleeveless leather jacket over her tanktop, and pulled out her cross necklace from underneath.
You see, Mello had decided that while her parents had no religion, she would be Christian. Matt of course was too young to understand religion, but she thought that eventually he would decide; stay with none, or choose one. She then stepped out of the washroom.
“Where were we, Matt?” Mello asked Matt. He held up his gun, which was obviously not loaded. Their father had bought it the same Christmas that Mello had gotten her scar. Matt loved it.
“I was making a distraction so you could take Taka!” He said. “I drove up and shot a bunch of people, left smoke bombs and stuff. Then now you drive up and steal Taka from Lider!” Matt pretended to drive away, and made siren noises so that it seemed as if the police were following him. Mello shook her head and ‘drove’ up to where Taka and Lider were supposed to be.
Mello didn’t know where Matt got his names from, but they always seemed to fit.
“You’re coming with me, Miss Taka.” Mello said to the imaginary person. Then she lifted her head to Lider. “I’ll keep her safe.”