What is the tempo indication for "slightly faster than andante"?

The term that describes a tempo that is "slightly faster than andante" is commonly understood to be "andantino." In musical terminology, andante translates to a moderate walking pace. The nuance implied by "andantino" typically suggests a step up in speed compared to andante but is still measured and flowing, capturing that slight increase in tempo.

This makes andantino the most fitting choice, as it directly communicates that it is slightly faster than the standard pace established by andante. The word andantino itself can sometimes be interpreted in different contexts, but it consistently conveys this subtler increase in tempo.

Allegretto, while inherently faster than andante, is generally considered a more pronounced tempo increase and might suggest a more lively character than just a slight difference. Saying something is "animated" or in a brisk manner would align more closely with allegretto.

The other options, andante and animato, don't align with the requirement of being "slightly faster than andante." Andante itself is the starting point, and animato conveys a sense of liveliness or spiritedness rather than a specific tempo alteration relative to andante. Therefore, andantino is specifically the term that meets the criteria set by the question.