Yeah, that'd work. Hopefully she has a thick coat or three (or maybe just a great many 'borrowed' habits) and a stash of hot oil to keep her warm, because it is not at all a straight shot over to where the Seekers were. She'd have to climb up the mountain for bit, then move laterally a long way through the wind and cold and snow. The gateway to the Graveyard of the Peaks is at a higher elevation than the Convent.

<Snipped quote by Lugubrious>

I think her physiology would keep her decently okay, she has a high constitution lending her a bit of an edge against the cold thus she might also continuously emanate her aura as she descends to meet the others, using her faith as her shield so to speak and that's where she can end up in your update as she reaches the Seekers just barely.

<Snipped quote by Dark Cloud>

'Higher than average constitution' and a resistance to 'ailments' do not an immunity to crippling, lethal weather conditions make. If by 'ailments' you meant 'all status effects, including temperature' that warrants further investigation. As for timing, Laharl would have to throw his attention-catching tantrum after the other Seekers start to climb. Even if Flonne set out immediately, it would take her a long time to get over there. Maybe she could try flashing her healing field at Laharl to get his attention in return, and after a half hour or so they could meet one another halfway.

Edit: her field is also healing rather than any kind of shield, according to her sheet, so instead of protecting her from the cold at all it would only be able to heal the actual damage that the cold inflicts to her body, thereby slowing down the rate of her hypothermia.

I'm not averse to the idea, but what part would I be playing in said collab? It seems like only Laharl and Flonne would be involved. Did you want me to help set the scene in the Convent?

Saving everyone else time is not really a concern, since now that Laharl has left the group (or rather, they've left him behind) he and Flonne are on their own. Laharl would have to get her up to speed on events that he probably doesn't fully understand himself and then suddenly go through all the character development you have planned for him thanks to Flonne in order to join them, so he's got plenty of time. Once the two reunite, they probably ought to descend back down to Tostarena Town or something. I can put a little something for Flonne in my update tomorrow for you.