In addition to being Akala's Kahuna, Olivia owns a jewelry and accessory store in her hometown of Konikoni City. Despite being chosen as kahuna at such a young age, Olivia maintains that she is just an average girl. The player eventually battles her in the grand trial of the Akala island challenge.
"Why hello there. Nice to meet you all—I’m Olivia."
"I was on my way to see who was pulling into port and ran into Mallow here while she was out on a delivery."
"And Mallow isn’t the only captain here on Akala Island, of course."
"So? What’s the plan, kids?"
"Yes... I suppose so."
"OK, then. Enjoy your time on your island challenge, kids, along with your Pokémon. I’ll be waiting for my chance to face you in battle when the time comes."
"This cave really is something, y’know? It’s overflowing with these Pokémon called Diglett, and they are getting really out of hand. Mediocre Trainers can’t even get through! So, how’s your island challenge going? Let me see which crystals you’ve earned."
If player hasn't cleared any trial on Akala Island
"OK, you’re doing all right! How’s that Waterium Z working out for you? Judging by how well you and your team get along, I bet you guys can do some real damage with it! OK, <player>, Kiawe’s trial is next! Off to Wela Volcano Park you go!"
If player hasn't cleared Mallow's trial
"It looks like you’ve tackled everything but Akala Island’s last trial in Lush Jungle! Just relax and have fun with it. Your Pokémon will be happier that way, too."
"Oh hey, since you’re here on Akala... Have you made it out to our Dimensional Research Lab yet? Traveling about for your island challenge is about more than just trials, you know. Have a look around while you’re at it."
If player has cleared all trials and visited Dimensional Research Lab
"Ooh, look at you, <player>! Nice work! I see you’ve even passed Mallow’s trial. It’s about time you had some fun with me! The Diglett have settled down, too. If you are as strong as you appear, you should be able to make it through this cave. At the other end of it, you’ll find Konikoni City. That’s where my shop is. I’ll see you there!"
"Oh! Sorry, I never even asked your name before, did I? Tapu Lele summoned me here to clean up the ruins. <Player>...thanks for getting to know the people and Pokémon of Alola."
Before Battle
"All right, then! You’ve completed the trials of all three captains here on Akala Island. Now you face the grand trial of the kahuna—me! Get ready for your hardest Pokémon battle yet on Akala!
I’d love to!"Great! We’re gonna give you guys everything we’ve got! And my partners are all adorable, rugged little Rock types!"
Not yet"Fine! I don’t want to win just because you weren’t prepared well enough."
Being defeated
"How lovely."
After being defeated
"Diamonds only sparkle after coal is pushed to its absolute limit. You guys are the best! Here. The Rock-typeZ-Crystal... The Rockium Z is all yours!"
"The Rock-type Z-Power...you have to move like this to draw it out! Watch carefully, because the hip movement is crucial!"
"Use it well. The Rock type... It’s hard. Sturdy. Rugged and physically strong. So nothing like me at all! I guess opposites really do attract."
Talk about Nebby
"By the way, Lillie, this might be a weird question, but... Why even come to the Ruins of Life if you’re not a Trainer?"
"You certainly don’t see Pokémon like that every day. Tapu Lele may be called the [[Guardian deities|guardian deity}} of our island, but it can also run wild at times. Regular Pokémon normally avoid the guardians at all costs... Unless they are strong enough to face the tapu themselves, that is."
"Wait, that can’t be right..."
"I think your journey will hold many surprises. And I hope it holds many joys. I’ll take you back to town, Lillie. You’re doing everything you can for your partner, even though you’re not a Trainer. I like that kind of person, so I can’t help but give you a hand!"
"Ooh, the Aether Foundation? I’m not sure what he wants with you, <player>, but why not go find out? If you don’t want to keep him waiting, then Charizard should get you there in no time. The Hano Grand Resort lies just over the bridge near the Dimensional Research Lab."
"You’re just Hau, right? And what’s wrong with that! Who cares if you’re Hala’s grandson? Now show me what Hau can do!"
"No introduction needed here. Time to battle me, Olivia!"
Upon being defeated
"Really lovely...both you and your Pokémon..."
After being defeated
"I don’t see the same look in your eyes that I saw when we first met on Akala Island. Have you had some experiences that you’ll carry with you in your heart forever? Well, it’s time for you to move on."
Rematch battle
Before battle
"I won’t be holding back! My Rock-type Pokémon will grind you to dust! Your puny little Pokémon are going to go down in one hit! Hah!"
After being defeated
"What a spectacular Trainer you are! Now when the children of Alola finish their island challenge, they can visit the Pokémon League to try to become the Champion! The Trainers of Alola will become even stronger!"
General afterword
(If chosen first) "You should get moving. You still have three more rooms left, right?"
(If chosen second) "Don’t stop now. You still have two more rooms left, right?"
(if chosen third) "I’ll stay here and wonder why you left me waiting so long for your challenge..."
(If chosen last) "Let me guess... you’re the type who likes to save the most delicious bite for the end of the meal?"
"Oh! Well, if it isn’t little <player>! Well, as long as we’re both here, why don’t we sit together, hm? And I’ll have whatever he/she is having."
"This right here! This is it! I may live on my own, but sometimes even I need that familiar taste of home cooking. Dig in, <player>, before it gets cold!"
"Ah... That was delicious. Maybe it’s about time I find someone to cook for myself, huh? Oh! But look at your plate, <player>! You’ve barely touched a thing! Local flavors not your thing?"
"This one’s on me. I like to see a boy/girl with a good appetite. Here, take these freebie Heart Scales they’re giving away."
"See you around, <player>. I do love a boy/girl with a good appetite!"