Found this as an intro for a Skeletron video (his legendary Calamity video, I believe) and I first thought that it was a Hopes and Dreams-type song.

3 players remaining and is it music playing start

Character Select Theme in Under Night In-Birth.

Under Night In - Birth OST- Gathers Under Night(Character Select Theme)

Under Night In - Birth OST- Night Walker(Linne's Theme)

Linne's theme from Under Night In-Birth
I do not own Under Night or any French-Bread/Arc Systems properties.