 If you liked
Lucky☆Star
|
 ...then you might like
Sansha Sanyou
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Sansha Sanyou and Lucky Star are two 2003 four-panel manga that focus on three female protagonists and are older titles of the ever-popular "cute moe girls" genre. Kagami and Yoko both have purple hair and similar first impressions; Tsukasa and Teru both have cute short hairstyles (but other than that, Teru would be more comparable to Kagami); Konata is a bit of a mix between Teru (snarkiness) and Futaba (mainly Futaba though, both tend to be honest, make pop culture references, and don't study).