I think the reason that Adam McArthur and Eden Sher worked so well on Star Vs. The Forces of Evil is the chemistry between the two actors was absolutely perfect and they were able to play off of each other so well because Adam McArthur always gave off this impression for Marco of a character that is trying to be cool but is kind of a dork but a lovable dork and Eden Sher always gave off this impression for Star of being a character who is manic and crazy but also has a big heart with regard to the things that she does in the show so Marco was the perfect character for her to be around since he helped her get used to the customs of Earth and also grow as a person in terms of learning how to handle situations. They just have so much charisma and I love them for that
