Swordtail was employed as a construction worker under Grasshopper until he became a fugitive with Blue and Cricket. He was simultaneously a member of the Cicada Hive Chrysalis. He currently resides within the LeafSilk Kingdom and is in a long-standing relationship with Luna.
Despite having very different personalities, Luna is shown to love and care about her younger half-brother
Luna is in a relationship with Swordtail and is shown to care a lot about him.