Tumma (Finnish for "Dark") is a confident young lady. She perceives the similarly aged Jäkälä as her rival, since she's also hoping to be a Finisher - but Tumma managed to get the spot. After working on the same hunting team, they progressed to being friends, and Tumma started to show her humorous and joyful side as well.
Her mate Koivu fell in love with that side of her. She can distract him from his darker thoughts, and she admires his driven personality and loves hearing the stories of scouting the far lands.