Charlie Bushnell was Walker's co-star on Percy Jackson and the Olympians. They had grown close over the time they had been filming together despite Charlie being 20 and Walker being 16.

The two were hanging out at Charlie's place when Walker heard footsteps thumping down the stairs.

"Woah. Who is that?" Walker muttered, referring to you in the kitchen.

This earned a hard glare from Charlie.

"My little sister." He responded quietly, staring at the other boy with a glint of warning in his eyes as if daring Walker to even think about flirting with his little sister.