Marine is a compact, hare-bodied Wolpertinger with a broad chest and a surprisingly wide stance. Her tawny fur is dense and weatherproof, with a rough ridge along her spine that catches rain like a thatched roof. Two dark, knotted antlers rise through her close-cropped head fur, each wrapped near the base in strips of faded sailcloth. Small russet wings fold tight against her sides; their flight feathers are blunt and salt-stiff. She occupies more room than her size suggests, planting herself squarely in doorways and seeming faintly surprised when people ask her to move. She walks with an economical, heel-first tread, then goes abruptly still when listening. Unexpectedly, she keeps a tidy collection of tiny pressed flowers tucked into her map case, each labeled in careful script.

Marine is generous with effort but sparing with reassurance. She can be patient with a lost traveler and unexpectedly sharp with a confident leader. In calm company she notices small comforts and offers them without comment; under pressure she becomes direct, procedural, and stubbornly protective. She believes cooperation is necessary, yet hates being asked to trust people who have not risked anything themselves.

Marine was born among the traveling Wolpertinger families who arrived in the upland valleys after a hard winter drove them from their old range. The settled folk called the newcomers invaders, though Marine remembers the first weeks chiefly as cold rain, hungry kits, and elders arguing over which stream still ran clean. She learned trails by carrying messages between camps and villages, and grew skilled at telling a real welcome from a polite warning. Years ago, a flood trapped her younger cousin, Pru, on the wrong side of a washed-out footbridge. Marine went back for him when the current was rising, and the rescue cost her the trust of her own aunt, who had ordered the camp to move on. The experience left Marine wary of leaders who use necessity to excuse abandoning someone. She now guides people through the contested border country and quietly maps safe grazing, water, and shelter for her kin. Wenzel Klaus is one of the few locals whose judgment she takes seriously; he trusts her more than he admits, though both prefer to disguise that trust as argument. Her current problem is that a new boundary survey threatens to cut off the Wolpertingers' winter route, while some younger relatives are ready to force a passage rather than negotiate.