Jinrui wa Suitai Shimashita, Hibike! Euphonium 2 Recommendations
Kumiko and Watashi are very similar heroines, by their personality, their facial expressions/funny faces. They also tend to help others.
Besides they are the narrators of their series.(Kumiko for Euphonium and Watashi for Jinrui)
Despite their colorful appearance, both series incorporate serious themes in their plot.