Lina is the first princess of the triplets.

On the bare surface she's a lazy jokester, dig a little deeper and you'll see she's motherly and protective. Dig deeper and her dark and depressed side comes in.

She's a nature siori, although she can teleport and in genocide she can summon the gaster blaster-like creatures.

This happens because she witnessed Frisk killing her sister, someone who may as well be her father, and her childhood friend/crush.

Her power color is a bright neon green.

She can also see through resets, even a true reset or erasing and bringing back the world because just before this happens she teleports -- or rather, gets teleported -- to a dark abyss where she experiences a pain worse then death until the player comes back and she's needed.

Lina towards Luna - She sees her as a little sister, and is really overprotective of her though she annoys her with constant jokes.

Lina towards Lisa - Lina hates Lisa, although she doesn't show it that much she just acts passive-aggressive towards her. Secretly, though, she's as protective of her as she is with Luna, proven as in Genocide she specifically says "I have to stop you, Lisa's still alive... Mostly..." meaning she only fights Frisk because of Lisa, after all, everyones already dead so she has very little to go back to.

Lina towards Marius - She humors him, although he gets annoying she still admires him as her own father.

Lina towards Kyami - Their best friends, always joking around with each other

Lina towards Kyuzu - They don't talk much, but whenever they do, Lina always praises her, wanting her to feel more comfortable considering she cares about all siori as if they were family, gaining a plus to her real family.

Lina towards Grillby - They were friends since they were 4, the friendship slowly turning into a deep crush over the years that she's too lazy and scared to admit, as she doesn't want to lose their friendship.