((I'm assuming her disappearance is plot-related, but in case there actually is a chance to pick up on something, please assume that I'm using Scent, rolling Survival, Perception, and the whole nine yards in my efforts to find her))
Lone Wolf emerges from the confines of the arena in good spirits, which is a shock to him, what with his embarrassing defeat at the hands of Stricia. The prospect of going on this mission is incredibly appealing to him, and he looks forward to telling Lady about it and hitting the road.
"Lady?" he calls for her. It wasn't unusual for her to wander off and entertain herself while he tended to human business elsewhere. Usually all it took was a single call, and....
This time, there was nothing. He begins to worry, prowling the area.
"Lady?!" He stalks along the perimeter, weaving in and out of the dispersing throng of spectators trickling from the arena. "LADY!"
https://www.youtube.com/watch?v=ACFYaHyWrMQ&feature=youtube_gdata_player
Nothing. No tracks, no scent to pick up on, no stray white furs.
"You seen wolf white fur?!" he frantically asks, repeatedly, to random passers-by. With every iteration of the question, his speech becomes less refined and more primal. More than anything he wishes he had it in him to revert to his own wolf form, where perhaps he'd have better luck, but that would have to wait.
He sees Stricia helping him, and though he doesn't have the time to show it, he is deeply appreciative; in his mind, this cements the idea that they are a part of the same pack, regardless of her abandonment of her earned leadership role.
His search continues fruitlessly through the night. He combs the campus, dithers in the docks, and meddles in the market district, and still there is no sign for her.
What will he do if she'd gone for good? Lady was the only packmate that didn't abandon him after he was transformed. He doubted he'd ever be able to put into words how much that meant to him. To lose her now.... This new pack he was now finding himself in simply couldn't compare.
When morning comes, the rest of the party finds Lone Wolf alone at a table, bags under his eyes and disheveled, a desperate, forlorn look on his face. He nods at Stricia, but apart from that he does not even react to their presence.