cheryl is the main character

i just completed the series and checked all the posters throughout the season and mostly they just showcased archie, betty, veronica and jughead. tbh i watched the whole show and always thought that she was the main thing cause the first thing we see in first season first episode is cheryl and the last thing we see in last episode of last season is cheryl. the series literally starts and ends with cheryl saving entire riverdale. thoughts?