The only reason that Zangya has now transformed into her full-powered state of 1 Billion is to completely annihilate Cooler as quickly as possible. This is due to the fact that Selipa has taken a vicious energy blast that has now left the Saiyan mortally wounded. The Hera knows that she has no time to be fancy and she immediately rushes in to attack. Her power greatly surpasses that of even Final Form Cooler and in a matter of seconds Zangya destroys the Frost Demon before running over to check on Selipa: her source of information on how to free Bojack and the rest of the crew.
The Hera assesses Selipa by sensing her ki and can feel the greatly diminished energy signature of the Saiyan who lays face down on the ground. At this point Zangya is not feeling sympathetic yet but rather desperate to free Bojack and complete her mission and so she tries to figure out a way to heal the Saiyan but nothing comes to mind. Zangya may have an impressive arsenal of attacks but she is certainly no healer and therefore finds herself stumped as to finding a solution to her problem of an injured Selipa.
"Damnit Saiyan you'd better not die on me before taking me to that Kai of yours, I NEED to free my crew!" states an angry Zangya who tries to wake the unconscious Selipa by shaking her but to no avail as the Saiyan is perilously close to death. Trying to save someone is a situation which is very uncharacteristic of Zangya who has always travelled alongside Bojack and co while conquering and murdering. She feels foolish for having accidentally sent Cooler flying towards Selipa earlier as he then fired off a truly cheap shot which has caused the Saiyan enough damage to put her in Selipa's current condition.
Zangya in fact barely understands what the whole arrival and commotion with Cooler was about as he just so happened to land on Earth as Zangya made her first arrival earlier to scout out the planet for any possible leads on freeing Bojack and the others. For reference it is currently Age 766 here in Selipa's timeline which, if compared to canon is one year before the Android Saga events occur in the canonical timelines of DBZ. This timeline of Selipa's however has already seen its share of differences.
Now minutes pass by with Zangya unable to find a solution until she suddenly senses two Earthlings approaching which turn out to be Krillin and Yamcha. The pair of Earthlings have disposed of Cooler's henchmen before swiftly rushing over to check on Selipa whose power they could sense having plummeted. Naturally they believe Zangya to be the attacker but after a fierce round of threats and vague explanations regarding her motivations Zangya manages to convince the Earthlings to stand down.
It is here that Zangya learns of the Senzu Beans as the Earthlings happen to have a few on them. The Hera watches in disbelief as Selipa suddenly leaps up good as new after having a Senzu Bean placed in her mouth.
"Whew, thanks guys" says Selipa who turns to see a shocked Zangya looking at her.
"Senzu Beans, they're super useful in a fight" says Selipa who suddenly notices Zangya's change in colour from before and her doubled up power.
"So you can transform after all eh? You lied to me"
"Had to be done, I don't go around showing off my true power unless I absolutely have to, those Senzu Beans interest me though" says Zangya who remembers to find their source once Bojack conquers this planet - or so she plans.
"Forget it, until we can trust you there'll be no beans for you. So what happens now? I see you did me a favour by destroying Cooler" says Selipa.
"I didn't do you a favour, I need you alive to take me to that King Kai of yours before I free my crew and conquer this planet"
"WHAT!?" exclaims both Krillin and Yamcha who are shushed by Selipa.
"Shoosh guys I've got this under control" says Selipa to which Zangya scoffs.
"You gonna attack me now?"
"No but I'm not taking you to King Kai because I can't. He lives in the afterlife and I'm not dead anymore" says Selipa.
"Well that's a shame maybe I should just kill you right now?"
"And yourself too? Because you said you wanted to come with me?"
"Damn, good point Saiyan. So we find ourselves at an impasse" states Zangya.
"Unless you're willing to take a look around Earth and see just how beautiful this planet really is which your 'master' plans on ruining with his invasion" says Selipa who extends an offer to Zangya. The Hera appears thoughtful for a moment as she decides to accept Selipa's offer and so, to Krillin and Yamcha's disbelief, she flies off free to explore Earth as she pleases provided that she brings no harm.
"Are you crazy!? How can you just let her go?" asks Krillin.
"I think she's pretty decent but confused by her mission, besides didn't you sense her power? Even I cannot beat her yet" says Selipa. The Saiyan has obtained an increase in her power following her severe injuries with the Zenkai bringing her base power from 35 Million to 38 Million which is a relatively small gain for her. Even combined with the x20 boost of her Oozaru puts her at 760 Million which is still not enough to take on the 1 Billion might of Full-Powered Zangya and so Selipa once again chose to talk the Hera down instead of confronting her.
For now the Saiyan can only hope that experiencing a taste of life on Earth might shift Zangya's views away from being such a zealot to her master.