I do! And here's what I generally use. Bear in mind it IS incomplete; expect additions as I play more of the game and try music out.
General/Background;
- A Darkness Opus
I personally consider this to be the 'main theme' of my CoC2, and the shared leitmotif of my character Strider and Kasyrra herself. Damn good track in general, can fit a lot of BGM situations.
- FF12, Seeking Power
BGM for the tutorial section, meeting Cait, venturing out into the Snowtorm, meeting Kasyrra. Roads of fate converge, here.
- Divinity Original Sin, Mysterious Guest
When Kasyrra visits you in your dreams, and you have a little talk.
- Divinity Original Sin, The End of Time
BGM for The Ways Between. High in the sky practically in another realm, able to see for miles upon miles. Really puts things into perspective, and reminds you just what you're fighting for.
Fire Emblem Fates, Past Below
The Convocation of Mirrors. 'nuff said.
https://www.youtube.com/watch?v=dVEWrwV01A8 - FF14, Songs of Salt and Suffering
BGM for the attack on the Winter City. Vengeance for Elf Waif!
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Leitmotif;
https://www.youtube.com/watch?v=4_ANxTOG_Xk - Divinity Original Sin 2, Mead Blood & Gold
If A Darkness Opus is the 'shared' leitmotif of Strider and Kasyrra, this one is Strider's overarching one specifically. Formerly a holy warrior analogous to a Spellblade-Paladin who one year ago fled the lands of the south and wandered before coming to the Frost Marches as a vagrant. Meeting Kasyrra and getting embroiled in following events causes him to remember why he picked up a sword to begin with, reacquiring his old powers and becoming a true force of nature.
https://www.youtube.com/watch?v=ND2vDndGfcQ - Divinity Original Sin 2, Lone Wolves Camp
Strider again. This one fits as general BGM for when he's doing something more willpower based or subtly impressive, rather than outright champion. Good for random BGM, as with A Darkness Opus.
https://www.youtube.com/watch?v=KRadW6_74YU - Final Fantasy 8, A Sacrifice
Leitmotif of Kasyrra #1. Sinister, corrupt, and for whatever reason obsessed with
you. Fits nicely when first meeting her.
https://www.youtube.com/watch?v=8BQw3qZ9H8A - Final Fantasy 8, Succession of Witches
Leitmotif of Kasyrra #2. Fits in most other situations with her. Meeting at the Wayfort, for instance.
https://www.youtube.com/watch?v=Pl8HV-ngAKw - Final Fantasy 12, Penelo Theme
Leitmotif of Cait. Bouncy, warm, and always got your back.
https://www.youtube.com/watch?v=DDnbbWkGvYU - Wheel of Time, Lan the Warder
Leitmotif of Brint/Brienne. Tough, rugged and dependable.
https://www.youtube.com/watch?v=rQ-9TaG396Q - Legend of Dragoon, Shana's Theme (Re-orchestrated)
Leitmotif of Etheryn. best girl don't @ me. Can play during several scenes, most of them self-apparent.
https://www.youtube.com/watch?v=iWYMVlGoaQo - FF14, Whisper of the Land
Leitmotif of Kiyoko. Fits while playing in the Ruined Shrine where you find her, and elsewhere at need.
https://www.youtube.com/watch?v=ZhUYPy7GVn4 - FF12, The Salikawood
Leitmotif of Quintillus. More than he first seems.
https://www.youtube.com/watch?v=D7gKoCoK3kA - FF12, A Quiet Decision
Lady Evergreen, all over. Whimsical and playful, but with an air of mystery and power to her.
https://www.youtube.com/watch?v=QOAD58HCB-c FF12, Eruyt Village
Leitmotif of Hethia. A druid of the old world. Good for when you meet her at Westbank and talk her down.
https://www.youtube.com/watch?v=gLgMvgOKUUM - Ao No Exorcist, Mephistopheles
Leitmotif of Kero, God of Tricksters.
https://www.youtube.com/watch?v=70g81Z-fx3A - Final Fantasy 9, Oeilvert
Leitmotif of Nareva, God of Knowledge.
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Combat;
https://www.youtube.com/watch?v=vnO4rSFl1eI - Fire Emblem Three Houses, Chasing Daybreak
Anytime there's a major combat sequence with a 'Pure' Champion, this can fit nicely. The ruin invasion in Getting Into The Closest, or during Winter City's Dungeon spring to mind. There are others.
https://www.youtube.com/watch?v=JeYATGs70Ss - Final Fantasy 14, To Fire and Sword
Same as the above. Can fit a multitude of situations.
https://www.youtube.com/watch?v=OPhgA8q13Ew - Pathfinder: Kingmaker, In The Name Of My Dream
If Kasyrra ever gets a combat sequence, this'll have to be it. Works well for that one sequence in Winter City. You know the one.
https://www.youtube.com/watch?v=rtlhadd8gjI - Devil May Cry 4, The Viper
Herald + Alraune Boss Theme.
https://www.youtube.com/watch?v=o80Ey51dqqY - Onimusha 3, Battle with Vega Donna
Master Whisper Boss Theme.
https://www.youtube.com/watch?v=wsa5ikoFy6A - Onimusha 4, Gargant Theme
Jarl Gunvaldsen Boss Theme.
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Location;
Hawkethorne
https://www.youtube.com/watch?v=A1Z2w68O_Rs - Witcher 3 Blood and Wine, Tavern Theme
Chilling with Garth and company in the tavern. Our very own home away from home.
https://www.youtube.com/watch?v=H6CcT5OV1ZI - Divinity Original Sin, Bittersweet Regrets
General Hawkethorne BGM. Anywhere that isn't the tavern or the castle.
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Hawkethorne Castle - Giving this area a section of its own, in anticipation of it becoming our base. Tracks here can double for Winter City after Dungeon's completion.
https://www.youtube.com/watch?v=Kcw8xNxkZtM - Final Fantasy 14, Solid
https://www.youtube.com/watch?v=aGYGJELrCOs - Final Fantasy 14, Nobility Obliges
https://www.youtube.com/watch?v=QOsO9o_WaRs - Final Fantasy 14, Nobility Sleeps
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Old Forest
https://www.youtube.com/watch?v=9xy9Q-BLp48 - Legaia 2 - Lost Forest
Most of the Old Forest. A vast, forested expanse filled with the ruins of the past, from the Wayfort to the Kitsune Ruins.
https://www.youtube.com/watch?v=FNuR1cCXeME - Fable, Prison
Westbank, while it's under Hethia's 'protection'.
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Harvest Valley
https://www.youtube.com/watch?v=QjP6z0YOlSA - FF12, Ozmone Plain;
Northern Harvest Valley, up to the river. Whimsical, light, good countryside with flowing fields.
https://www.youtube.com/watch?v=iR3yMqpaCrU - FF14, Drowning in the Horizon
Southern Harvest Valley, from the river and below. You've got old ruins here, and a very tribal atmosphere between the Centaurs and the Marefolk.
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Foothills
https://www.youtube.com/watch?v=Kcw30RpujAc - Divinity Original Sin, Flutter of a Butterfly
Roaming the Foothills in general, regardless of location. Wide open spaces, fresh air, and harpies. What's not to love?
https://www.youtube.com/watch?v=yzdIgRZ_34g - FF12, Jahara Land of the Garif
The Orc Camp. Very military and tribal compared to the rest of the Foothills.
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Frostwood
https://www.youtube.com/watch?v=5h7KyokeLmM - FF14, Poison Ivy
Most of the Frostwood. Welcome to the land of a fallen and fading people, full of past majesty and glory.
https://www.youtube.com/watch?v=0IkIGkp9OyE - FF14, A Father's Pride
The Kitsune outpost, and when meeting Komari. I consider it the theme of the Old Country as a whole.