Terara the Pteranodon and Aroro the Ankylosaurus were the 2nd DinoKaiju duo who wreak havoc in Ep.5 of Dinosaur Great War Izenborg, been the 6th and 7th Dinosaurs unleashed in the show's order of appearance.

Been the 2nd Pteranodon in the show after Terrano, Terara was the first to be unleashed in the episode and shared the same abilities as his predecessor: creating strong gust of winds and could breath both fire and a laser beam from its mouth. Terara showed to be as, if not more, ruthless than Terrano was, as Terara is order to killed Aroro under Ururu's commands with no protest.

Aroro was the 2nd DinoKaiju awaken in the episode. The large Ankylosaurus could dig its way through the ground and breath fire, as most of the others did; like any Ankylosaurus, it possess an armored carapaces, surrounded with massive spikes on the side – these ran down the neck and to the sides of the body, all the way to the tail, ending with a bulge tip; its head had two long horns and red eyes, with sharp teeth. Its massive armor while giving protection of projectiles, it was more of a detriment, as the beast possessed a high center of gravity, due to its long legs supporting such massive heavy body; he had to walk on a wobble and toppled with ease when stunned, needing assistance to stand up – indeed this weakness leads to its killing at the hands of Terara under Ururu's command.

Continuing its war against Humankind, Ururu sends Terara to the surface for the next attack, the new Pteranodon been immediately detected and destroying a squadron of JSDF Jets, D-Squad deploys in response. Ururu then awakens the Ankylosaurus Kaiju Aroro and the two beast attack the countryside, Aroro mostly causing damage on its march – the Izenborg Units goes to action and combat Aroro. During their first battle, after projectile strikes from IzenOne proved ineffective, IzenTwo used incendiaries bombs, forcing the monster to go underground - Terara then shows up to fight .

Quick Rant: their battle is really stock footage of their battle with Terrano, and indeed, in what is a major detriment to the series, this happens almost every time a new Pteranodon comes out. My understanding is there are like 6 (or 7?) in the show total with little to no difference in color between them, as they use the same prop and footage of Terrano.

Aroro comes out again, and this time, IzenTwo uses its Proto laser to stun the monster, causing it to topple – Terara flies by and helps the beast to turned around with the massive gusts of wind these fly by produce; Aroro again, escapes underground heading in direction of a Nuclear Power plant; As Ai and Zen are there to warn the staff, the Ankylosaurus comes out. The siblings board IzenOne for their 2nd round with Aroro. Following the advise of Barra, they uses their lasers and stunned the monster, toppling twice – frustrated with this, Ururu orders the Ruthless Terara to get rid of the Ankylosaurus, carrying the order without protest using a laser beam, killing Aroro, to the shock of the Izen-Pilots.

(Now this is where it gets a bit confusing, as again, from Eps 4 to 39 which I saved, there are no Subs to understand what exactly happens, so work with me here, so feel free to correct me on this).

Terara continues to attack the plant and IzenOne, causing the release of Radiation (alarms are seen going off on this); in toppling the IzenOne over, Ai hits her back with the corner of a console – Terara then issue its Ultimatum, and the siblings try to IzenCross, but are unable to due to the Radiation(?) zipping into the tank. Ippei decides to help but Barra knocks him out and comes down and covers the IzenOne with fire retardant (work with me here, this what the Episode is showing), isolating the tank from the radiation, allowing the siblings to IzenCross.

Now as the Izenborg, the siblings go after Terara; avoiding its fire breathing attacks by going underground, the ship comes out at full speed towards the Pteranodon, killing it with the IzenDrill. The Heroes celebrate their victory and return to base, Ururu again vows revenge.