Alphys

Alphys unlike her Undertale counter part will try to kill you and she wears a scientist suit and on the chest says smart hero.

Attacks
Shocker gun: She shocks people with her gun doing a lot of damage.

Grenade launcher: She has a grenade launcher.

RPG: She can shoot you with a RPG.

Magic gun: She can make people magic with this gun.

Soul gun: This can crack someone soul.

Fun facts

 * She's in love with Undyne
 * She's best friends with Sans because Sans helped her