You can find the instrumental sheet music (often referred to as "paper") for Seraphine's theme on community-driven platforms like MuseScore. 🎼 Sheet Music Resources
The official theme, titled is a mix of pop and orchestral elements.
If you prefer guitar, you can find the Overdriven Guitar Solo tab on Songsterr. 🎵 Instrumental Features
Features a prominent Cello (performed by Cameron Stone) and Violin (Paul Cartwright).
If you're looking for a or a specific instrument like flute or violin solo, just let me know!
You can listen to the full official track on the League of Legends YouTube channel.