Prejudice can be a big challenge. Some people in the military or society may underestimate girl commandos at first. But in the stories, they often prove themselves through their outstanding performance in combat, intelligence gathering, etc. They also face challenges in terms of family. Balancing family life and the dangerous job of a commando is not easy.
The 'Window Viper' in a scary story could be a really menacing figure. Maybe it's a mysterious creature that lurks outside windows at night. It could be a shape - shifting entity that terrifies those who catch a glimpse of it through the glass. Just the thought of something sinister being right outside the window, watching, is truly frightening.
In some fanfictions, they might use a time - traveling device created by a brilliant scientist. Maybe it's a modified version of a Stark - like technology that creates a time - warp portal.
They might start off a bit warily. The Howling Commandos could be skeptical of the Avengers' powers at first. But then they would realize that they can all contribute to a common goal. For instance, Thor's lightning could be used in a way that the Commandos had never seen before, and they could offer their knowledge of stealth and guerrilla warfare to the Avengers.
They might be amused. The fanfiction world can come up with some wild and creative ideas about Captain America, and the Howling Commandos would probably get a kick out of seeing these unique interpretations.
I'm not sure specifically which 'C Viper' you are referring to. It could be a character in a game, a codename in a story, or something else entirely. If it's a game character, you might want to check the official game lore or fan-made story collections.