Prince Olympius

Prince Olympius was the dragon-like son of Queen Bansheera and the prince of the demons. His father is never mentioned. At the beginning of the series, he is still an infant demon, named Impus, who was cared for by the Demons in his mother's absence. As Bansheera repeatedly threatened to give Impus Diabolico's Star Power, the baby demon served as the primary threat and motivation for Diabolico's quest to destroy Mariner Bay and the Lightspeed Rangers. Eventually, Impus gained the Star Power when Diabolico was destroyed for the first time, causing him to encase himself in a red and black cocoon. Soon after, he completed his evolution and emerged from the cocoon as Olympius. He took Diabolico's place as the Rangers' main antagonist, but his youth and inexperience left him less adept than his predecessor.

Shortly after his metamorphosis, he gained access to the Aquabase by capturing four of the Rangers, enabling him to assume their forms. Carter Grayson (the Red Lightspeed Ranger) was able to see right through him and foiled his plans, resulting in Olympius falling into the sea. Exposure to water caused Olympius to lose most of his personal power, including his ability to shape-shift. No longer a physical match for the Rangers or his fellow demons, Olympius found himself forced into a subservient position as Vypra and Loki took command of the demon forces.

Despite his decreased power, Olympius still managed to cause trouble for the Rangers. In one battle, he actually destroyed the Rangers by using a device that allowed him to use the Rescue Bird against them. Unfortunately for him, Carter's experimental Mobile Armor Vehicle malfunctioned, sending the Red Ranger back in time. Realizing what had happened, Carter was able to change history and prevent Olympius from pulling the trigger on the other Lightspeed Rangers. Olympius has a strong hatred for Carter and repeatedly attempts to capture him, but his attempts are always unsuccessfully carried out.

Eventually, Olympius managed to revive Queen Bansheera, but instead of treating him like a prince, she treated him as just another expendable pawn like the rest of her minions. His plans to win her affection were unsuccessful, causing him to quickly lose her favor. When he discovered that Vypra and Loki were to take his place as second-in-command, he plotted to eliminate them by using the monster, Vilevine, to bury the two of them alive. Vypra and Loki survived and resurrected Diabolico during Olympius' next attempt to destroy the Rangers by having the Shadow World's Gatekeeper trap the Rangers in the Shadow World, roaming with defeated demons. However, he himself became trapped at Diabolico's bidding when the gateway was destroyed and the key was stolen - to add insult to injury, the Rangers eventually escaped.

To escape the Shadow World, Olympius began defeating the other occupants of the realm, absorbing their energy and evolving into a more powerful, monstrous form. Meanwhile, Jinxer - still loyal to the demon prince - hypnotized Captain Mitchell, commanding him to place a Star Power link inside the Aquabase generator to provide Olympius with more energy. After breaking free of the Shadow World, Olympius seem unstoppable until Ms. Fairweather broke the link to the Lightspeed Aquabase's energy, weakening Olympius enough for the Rangers to defeat him and destroy his Star Power. He was left under the care of Jinxer for a short time, regaining his strength.

Upon recovering his power and after Vypra and Loki's deaths at Bansheera's hand, Olympius took revenge on Diabolico by besting him in battle and having his mother turn Diabolico into a mindless slave. With his new minion in tow, Olympius attacked the Rangers, but his plans were derailed when Diabolico regained his mind and rebelled against Olympius. Although the demon prince was able to destroy Diabolico once again, the Rangers used the opportunity to destroy him in return. Queen Bansheera revived both Diabolico and Olympius in new "Super Demon" forms, allowing them to demolish almost all of the Megazords. Victory seemed at hand until the Rangers brought in their latest and most powerful Megazord: the Life Force Megazord, which killed the two demons once and for all.

Impus was responsible for the creation of a variety of different monsters, most of them either fire-elemental (like Fireor and Trifire) or reptilian (Freezard and Infinitor). Other creatures affiliated with him included Mantevil, Vilevine, and an unhatched Monster Egg (which was predicted to grow into a giant hydra monster). After maturing into Olympius, he proved to be a noteworthy adversary to the Rangers. However, using the Star Power put a great strain on him; he had to gradually get used to his new powers. In his first encounter with the Rangers he swiftly defeated them and managed to capture four of them within the Star Power. Soon after, he used the Star Power to turn himself into nearly identical duplicates of his prisoners and used this power to infiltrate the Aquabase. However, after being weakened from exposure to water, he could no longer contain the Rangers inside the Star Power.

In battle, Olympius displayed excellent physical strength, stamina, and skills with various weaponry. He primarily used a double-bladed spear, but occasionally used some of the Rangers' own weapons against them, including Carter's Rescue Blaster and the Rescue Bird. Olympius also has shown the ability of pyrokinesis by expelling fire and controlling it. He is a skilled warrior, defeating an army of undead demons during his time in the Shadow World and even besting Diabolico twice (destroying him outright the second time). In his more powerful draconic form, he displayed great powers by reflecting the Rangers' weaponry and firing his own energy. However, to maintain his strength in this form he needed an external energy source (for this he drained power from the Aquabase); without a suitable energy source he was considerably hindered. Even so, he managed to survive blows from the Omega Megazord and Lightspeed Solarzord that would have normally destroyed other monsters, weakening enough only to revert him back to his normal form and destroy his Star Power. In his Super Demon form, he was at the peak of his power; by combining his powers with Diabolico, he managed to destroy nearly all of the Rangers' Megazords, a feat that very few villains and monsters have achieved in the series.

Olympius alters his appearance and anatomy over the series, though all his forms have a red color scheme and draconic aspects. His infant form was a mix of a Furby with a baby dragon. His second (adult) form is a humanoid dragon-like warrior with a white face. After escaping from the Shadow World, Olympius developed more demonic features, including large horns, talons, and tail, a snake-like neck, bestial musculature, and a Malebolgia-like jaw. His Super Demon form exaggerates his monstrous features in a Godzilla-like fashion, with a longer, more reptilian snout and the removal of white colors on his face.