Aithra and Rosa have been friends for a very long time, so close that they're more like sisters, back when they were young Rosa had trouble talking English and sometimes she said things wrong. Aithra once a loner now has Rosa on her side, since they're childhood until today. Aithra finds it strange when Rosa speaks Spanish to her.

Now that Rosa know good English, she couldn't resist calling Aithra "hermana"

Hermana means sister