A full month have passed since Terrence killed his Liontauress who betrayed him, though he was then knocked out cold by Bluebell before she and the others helped removing his left tusk while he was still alive, and also successfully made sure that he will be staying alive after his left tusk was removed, before he's then was sent to rot in Tartarus for the rest of his life. Also, it was now 56 months (4 years and 8 months) since Chloe first arrived in Equestria, as well as it was also 44 months (3 years and 8 months) since Aylene became her beloved Pegasus pony sister, and they're both doing along well as they're helping their family and friends raise the two orphaned Liontaur cubs, who are now a month-old each, but are still dependent on adult creatures, even if they are non-Liontaurs. They decided to call the female cub Sirga (after the name of a lioness which was raised since she was just a little cub by humans back on planet earth) and the male cub Simba (Which means 'Lion' in Swahili), and the two baby Liontaurs seems to be happy to know that they're going to live and have new friends with the other baby creatures (none of which were Liontaurs).
As for Chloe, Aylene and Stephan, they all knew there's something specially important that is coming soon - Chloe's thirteenth birthday, which means that Chloe is going to turn 13 years-old very soon, and Chloe hoped that she will be happy to celebrate her thirteenth birthday with Aylene, Stephan and everyone else, especially her family and friends. There are only three days before Chloe will turn 13 years old, and she knew that not so long after her thirteenth birthday, she, alongside Aylene and Stephan, will also celebrate five years since her arrival in Equestria, and also celebrate four years since Aylene officially became her sister (both will be celebrated at the same time, four months later).
Chloe, Aylene and Stephan were all so excited and they wanted to know and see how and what Chloe's thirteenth birthday party would be like, and Chloe knew that soon enough, she will become a teenage girl when she turns 13 very soon, and as for Lysander, who still wants to eat her, Sayla, who still wants to torment her, and Akeno, who still wants to abuse her and Aylene for being a human and a pony, they're all still searching for their elephant friend, Terrence, who is still locked up in Tartarus, and the wound that was left where his left tusk should be started to slowly heal over the last month since he had his left tusk removed (while he was still alive), but soon enough, a new animal villain will be coming to rescue him, set him free and will help him escape and leave Tartarus very soon.
A day have passed, and there are now only two days left before Chloe will turn 13 years old and will celebrate her thirteenth birthday with, Aylene, Stephan, her Equestrian family and all of her Equestrian friends, and at the same time, Terrence is still locked up in Tartarus and is now waiting to be finally released from his cage, and after waiting for quite a while during the day, a southern white rhinoceros suddenly came out of nowhere and went charging towards the one-tusked elephant, who is still locked up in his cage, and then the rhinoceros slammed its head and horns against the iron bars on Terrence's cage, and eventually, when it broke and knocked two of the iron bars loose and out of place and away from Terrence's cage, this is when the rhinoceros got with only its head and part of its neck through the gap into Terrence's cage and looked up at the one-tusked elephant in the eyes, but Terrence looked shocked and also a bit terrified to see such a tough rhinoceros like the one who just broke off and removed away two iron bars from his cage actually coming to his rescue at last, especially after the elephant have suffered in Tartarus for an entire month for all of his crimes he have done so far in his life.
Then, Terrence asked the rhinoceros "Who...who are you?", and then the rhinoceros said "My name is Ganda, and I'm here to set you free from your cage, Mr. Elephant.", but then Terrence said "My name's Terrence! And as you can see, I'm an African bush elephant! I was supposed to have two tusks, but my enemies knocked me out and managed to remove my left tusk while successfully keeping me alive throughout the surgery! That's exactly why you can see I have only my right tusk, and thus making me a one-tusked elephant!", and when Ganda showed her horns to Terrence, she then said "Take a good long look at my horns, Terrence! These were precious and poachers will come for them more than to elephants' tusks!", and then Terrence asked her "How come?", and then Ganda explained "Back on planet earth, there are more elephants and less rhinos living in the African plains, and that's because poachers often hunt more rhinos than elephants! Our horns were more worthy to be sold to the black market and to be traded there for lots of money compared to elephants' tusks!", and when Terrence heard when the female rhinoceros said, he then gasped in shock to know that back on planet earth, there are more of his species and less of Ganda's, before he then said "I...I didn't know your species is more endangered than mine!", and then she said to him in a sarcastic tone "Surprise.".
Then, Ganda rammed herself into another iron bar, before she then grabbed it with her mouth and teeth and broke it out of place, before she then tossed and threw it away to make the gap in the cage even wider, and then she managed to get into the cage with the rest of her neck, the front part of her body and her left foreleg, and then she raised her left foreleg up to let Terrence shake it with his trunk as she said to him with an evil smile "I promise to become your new partner, Terrence, and I also promise you I will get you out of that filthy cage! This is no place for a wild animal to live in, especially when it comes out to be locked up in Tartarus!", and then Terrence wrapped his trunk around Ganda's foreleg and then he shook it and said back "Thank you, Ganda! Even if you're not an elephant like me, we both still have something in common!", and once he let go of the rhinoceros' foreleg, Ganda then continued to ram herself into his cage and break and remove the rest of the iron bars out of place and throw them away so Terrence will be able to stop out of the cage and escape along with her.
Another day later, there was only one day before Chloe will turn 13 and will celebrate her thirteenth birthday, and at the same time, Ganda successfully managed to break the cage and set Terrence free, and with the one-tusked elephant free from imprisonment, Terrence actually thanked Ganda and said to her as they started to walk away together "Thank you for saving me! These blabbering Pegasus filly and her so-called demonic centaur friend of hers nearly drove me into a nervous breakdown!", and then Ganda said to him as they continued to walk away together until they both reached a secret hole, which actually acted as a secret passage way in and out of Tartarus, and when the two African mammals entered and went through the secret hole, they both finally managed to escape and get out from Tartarus, and they managed to run together to their freedom.
Once out and away from Tartarus, Terrence started to search for Lysander, Sayla and Akeno, and he took Ganda the rhinoceros along with him so she can meet them and become one of their team as well, and Terrence even told her that she would surely fit in with his friends and with their powerful and force-joining team, and then Ganda said to him "I hope they will accept me like they accepted you. After all, Lysander is a crocodile, which makes him a reptile, Sayla is a gorilla, which makes her a primate, Akeno is an okapi, which makes him an artiodactyl, and you're an elephant, which makes you a proboscidean.", and then she added "I'm a rhinoceros, which makes me a perrisodactyl.", but then Terrence said to her "I'm pretty sure my friends will accept you if you tell them about yourself and about everything bad you've been through in your life, Ganda.", and then he added "Besides, I don't care that you're not an elephant like me, because you dared to risk yourself to save me and set me free from that hell prison known as Tartarus.", and then he continued "And even though I'm always intolerant and will hate all kinds of baby female creatures, because none of which were African bush elephants like me, I still trust you for the rhinoceros you really are, Ganda, and for daring to rescue another villainous animal that is just like yourself, which was in that case - it was me!", and when Ganda heard everything the elephant said to her, she then blushed at his comments, thus showing that she actually appreciated hearing everything he said to her, and she also blushed because she didn't expected an elephant to tell her that he truly enjoys to be her new friend for saving him from serving a life sentence in Tartarus.
The following day, it was finally the day when Chloe finally turned 13 years-old and now she's waiting for to celebrate her thirteenth birthday, and she, Aylene and Stephan were all so excited to know and see everything from what everyone have prepared for them (especially for Chloe herself) for the birthday party, and Chloe said to her Pegasus sister and centaur best friend "I'm so excited to see everything everyone have prepared for my thirteenth birthday party!", and then Aylene said to her "Stephan and I both want to see everything too!", and then Stephan added "It's going to be the first birthday of yours in which I'm officially invited in as a new main guest!".
Later, when Twilight and Rainbow Dash came to tell Chloe, Aylene and Stephan that they need to return to royal castle back with them (since the three were all playing together in the meadow at the time), this is when Chloe, Aylene and Stephan all jumped together in excitement as they all knew that as for the celebration for Chloe's thirteenth birthday - the time has come, and so Twilight decided to help them by using her magic and teleporting Chloe, Aylene, Stephan, Rainbow Dash and herself back to the royal castle, and then, once they're all back in the royal castle again, Twilight and Rainbow Dash led Chloe, Aylene and Stephan with them to the Grand Galloping Gala ballroom, and when they opened the doors leading inside, they're surprised by their family and by all of their friends as well, and even Sirga and Simba (the two baby Liontaurs, who are now both a month-old each) were present, and it is revealed that everyone have prepared to throw Chloe, Aylene and Stephan a birthday party (that was especially for Chloe, with Aylene and Stephan being the invited main guests besides her), and then Pinkie Pie shrieked out loud in a happy tone "HAPPY BIRTHDAY, CHLOE! YOU'RE NOW 13 YEARS OLD!", and when Chloe saw everything everyone have prepared especially for her so she can celebrate her birthday party, but Aylene and Stephan were both also allowed to look at everything that made them smile and become filled with joy and happiness, and as for Stephan, he was so happy because it was the first birthday party of Chloe's he have ever experienced and celebrated alongside both Chloe and Aylene, and as a new main guest, and that almost made him to forget about his evil biological father, Howard, who abused him so many times and even almost managed to trick him into becoming evil turn on all of his real friends (temporarily, of course).
Meanwhile, as for Terrence and Ganda, the two African mammals were both still searching together for the three other animals (Lysander, Sayla and Akeno), and Terrence also wants upon reuniting with them to introduce Ganda to them and to persuade them to add her to their team as well for being a villainous animal too (and to be the team's fifth member overall), and thus will make her the one and only member of the villainous animals team to be a perrisodactyl mammal (an odd-toed ungulate), and thus will make her feel even more stronger and more intimidating than she used to, before she met Terrence and rescued and freed him from Tartarus. Terrence and Ganda both hoped they will find Lysander, Sayla and Akeno and will not only get Terrence reunited with them, but also get Ganda introduced to them and to make her the fifth member of their villainous animals team, and so the two African mammals continued to search for the three other animals in hopes that they will eventually find them.