We don't have enough information to know exactly who Karen is. She could be an ordinary person, a student, a teacher, or just someone who likes to read stories.
Given only 'dateline karen read story', Karen's identity remains a mystery. She might be a staff member at Dateline who was reading a story for work purposes. Or she could be a person who was interviewed by Dateline and was reading a story during the interview, or she could be an ordinary person whose story - reading experience is being highlighted in relation to Dateline.
In 'Home' by Gwendolyn Brooks, the poem often explores themes of belonging and identity. The use of language is very characteristic of Brooks, with vivid imagery that helps the reader picture the concept of 'home' she is trying to convey.
Mr Brooks is purely fictional. It's not drawn from any actual events or people. The story was developed to provide viewers with an exciting and suspenseful cinematic experience.
It's hard to say for sure. 'Karen' could be a blend of real incidents and creative imagination. Sometimes, such stories take real-life inspirations but are embellished for entertainment value.
I don't think there was a character named Karen in Punisher comics. Usually, the main characters and well-known ones are pretty distinct, and I haven't come across a Karen in this series.