You'll want to start at the village of albinaurics in southwestern liurnia first, where you need to track down old albus - he's hiding in a pot near the depraved perfumer. Watch for the telltale glow of the pot and strike it precisely to reveal him, which gets you the crucial haligtree secret medallion right half. The path to latenna runs through lakeside crystal cave southeast of the village, and this is where timing gets important. The bloodhound knight inside has a distinct attack pattern - he'll lunge with delayed slashes that you need to dodge just as his blade starts moving, not when he begins the windup.

After clearing the boss, follow the newly opened passage to reach slumbering wolfs shack. Latenna's positioned against her wolf lobo, but here's the critical timing detail - you absolutely must show her the medallion from albus before getting both halves, or you'll miss the questline entirely. When you do this right, she'll trust you and become available as a spirit ash companion. Really important to note that if you're planning to get the somber ancient dragon smithing stone later, this conversation has to happen before collecting both medallion pieces, since the timing locks you out of rewards if done wrong.

The questline continues naturally into castle sol up in the mountaintops, but focusing just on finding her - get that medallion piece first, time the bloodhound knight's patterns carefully, and make sure to talk to her before collecting anything else.