One of the more touching things that Luster picked up from her mentorship with Twilight was of the understanding that her relationship with her younger brother was a very special and inclusive kind of friendship.

She absolutely cherished Starfire, and he did in kind to his older sister, and Luster picked up Twilight’s use of acronyms and frequently referred to Starfire as her Little Brother Best Friend Forever. Starfire in turn also liked to call Luster as his Big Sister Best Friend Forever.

It was in their view much better than 'My Little Starly' and 'Lusty Wusty' that their mother liked to call them…