Luke Hemmings' Sister m.g.c.
Kateryne is Luke's twin sister, she grew up with him, in Sydney, Australia and was there for him through thick and thin. The twins go to high school, and Kateryne becomes friends with everyone, her personality being completely friendly - and Luke stays as an awkward nerd.
Kateryne soon becomes friends with Michael Clifford, Luke's worst enemy, she convinces the two, both phenomenal guitar players, to play together. Over time she and Michael become more, and Luke and Michael begin a band.
Kateryne Hemmings made 5 Seconds of Summer, twins with one member, in love with another, and responsible for their management and taught Luke, Michael and Calum the guitar (the latter eventually moving on to bass).
This shows how Kateryne made 5 Seconds of Summer, whilst juggling a hectic life and trying to get good grades.
**This is my first fanfic and I've been wanting to do this for a while go with it please**
Kateryne is played by Nina Nesbitt