When Bettani first returned to Zaun, she was intending to have a solo mission in the Sumps. She had second thoughts upon nearly getting robbed by some schmucks (they ended up peppered with acid burns and struggling to find footing on her slippery slime), and witnessing crimes in the double digits during her descent in the fissure. She wasn't sure her supplies would last past the Entresol Level.

The thought of getting backup came to mind. She wasn't going to waste time on either going back to Bandle City to get a scout like Teemo or trying to find someone in Piltover willing to get messy in Zaun, but Zaun was just full of sketchy people who would stab her in the back. She stewed over her conundrum, until she was interrupted by an explosion on an above walkway.

She watched as a yordle hopped onto the railing of said walkway with a bellow of "GOOD MORNING, ZAUN!", before he dove out of the reach of some angry Chem-Thugs. The people around Betti cleared the streets at the sight of this yordle, though Betti herself just watched as the guy detonated a bomb of all things to keep himself from a hard landing and instead launch himself at an old building. He was only in there a few seconds before leaping out, and that building exploded.

And so, she watched as this yordle zipped around, launching himself with explosives, demolishing old buildings, structures, and walkways, and clowning on the Chem-Thugs that were chasing him. Betti found it intriguing, this strange combination of a fight, a fireworks show, and an acrobatic circus act all done by this one yordle.

It wasn't until that yordle fumbled a bomb and blasted himself in a wrong direction, landing at her feet, did he notice her. When he regained his bearings, he sat up, turned to her, and asked, "So... didya enjoy the show?"

"You certainly have a way with explosives, sir," she replied coolly.

He hopped to his feet, dusted himself off, and offered a hand. "Name's Zigmund--Ziggs for short. How ya doin'?"

Betti stared at the hand for a moment before giving it a shake. "My name is Bettani, and I am doing alright."

"Bettani, huh? Hope you don't mind me calling you Betti."

"You may do so, Zigmund."

Before their conversation could continue, the Chem-Thugs caught up with him, and Betti finds herself caught in the fight she was watching earlier. After a tussle involving some of Ziggs' cherry bombs and some of Betti's popping crystals and homemade pepper spray, they managed to get away, with the thugs now dealing with some slippery slime.

Ziggs takes her out for lunch, wanting to know more about the popping crystals (while Betti's curious about what he blew up to tick those thugs off), and it goes into a conversation about her occupation as an alchymist and what exactly she's doing. All he gets is that she's heard of a 'slime monster' in the Sumps, and she wants to find it (he's heard the rumors about the slime monster, among other monsters down there). Not wanting this little lady to go alone, facing a lot of dangers that come with descending the fissures, he offers to help as a bit of extra firepower. She agrees... but she doesn't want him to blow up the specimen.

Once upon a time, she worked for a Chem-Baron, and was one of the leads of developing a chemical super-soldier from some sentient goo from the Sumps. However, as it developed its sapience and a childlike innocence, she fell in love with the ooze and started treating it--no, he--like her own child. While she was aware what the Zaun Amorphous Combatant was meant to be, she was horrified when watching one of his abilities tests--the empathy that made him respond positively to her love also turned him into a monster in response to hostility.

Not wanting her baby "Zac" to be a weapon, she and her favorite lab partner Erik (who had also grown attached to the little guy) would sneak him out of the lab and go undercover. From there, they raised him to be an upstanding citizen--to control his powers, to not be influenced by Zaun's negative atmosphere and strive for hope and positivity, and even how to speak and read and reason like a person. And in disguise, Betti (dusting off that lovely yordle glamour to look human) and Erik would use their talents to help the innocents of Zaun.

Then, one day, years after they broke away, she and Erik were ratted out by a sleazy yordle seeing through Betti's disguise. From there, they were captured and tortured. Betti in particular got some insanely cruel and painful treatment from former colleagues since they wanted to see "how yordles tick". She didn't know how long it went on--minutes felt like hours and hours felt like days under immense pain--but there eventually came a point where it was just too much. Next thing she knows, she's waking up in Bandle City.

She had a meltdown. Her life, her best friend, her baby... she was ripped away from them horrifically, and who knows how much time would pass until she's 'recharged' and can return to Runeterra. Erik was likely dead. And what if that Chem-Baron managed to capture Zac and turn him into a weapon? She was inconsolable, and thus had to spend some time in Bandle City's mental hospital (headcanon: it's there because yordles often have breakdowns after a traumatic death).

Letting her anger fester to concerning levels under a colder exterior, first thing she did upon release was prepare some personal chemical weaponry for when she can return to Runeterra. Once she's able to use Bandle portals again, she returns to Zaun to find Zac and get revenge on those who ripped her family apart, not caring if she destroys the city in the process.

Problem? Things have changed a lot while she was away. Zaun has gotten even more crime-ridden and unpredictable, new Chem-Barons have risen, and there is just a lot more chaos in general. But that doesn't matter to Betti--she has a mission.

She teams up with fellow yordle Ziggs (only letting him know that she's investigating rumors of a slime monster), and they embark on an explosion-filled adventure deep into the fissures. While Betti does find herself growing fond of Ziggs, she mainly focuses on her goal, and anyone who gets in her way will face the acids, slimes, and explosive compounds she has on hand. And should she stumble upon her old boss or old colleagues... they will suffer her wrath--regardless of what Betti's new friend thinks about it.

Bigger question is... what would Zac think about it?

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Obviously, from the first pic, they do reunite, but I will say that the first reunion is not as rosy as Betti hoped. It takes a bit of time for Betti to cool down her anger, rekindle her desire to help the people of Zaun, and figure out her new normal--especially with a grown, experienced hero Zac who grew up with a different Betti than the one he sees now--one that taught him to be positive and hopeful in miserable surroundings as opposed to the more cynical and cold yordle she became.