Frog (カエル Kaeru?, Kaeru in the Japanese version) is a knight from the Middle Ages in Chrono Trigger. His real name is Glenn (or Grenn in Japanese media). He was presumably a squire under Cyrus, a "Knight of the Square Table." (This reference only exists in the SNES/PS version.) Glenn had a notably close friendship with Queen Leene.
In his changed form, Frog only stands around four to five feet tall. However, he is immensely strong, since he is able to wield the Masamune with great ease. His amphibian physiology allows him to jump very high and move very swiftly by hopping like a real frog. A few of his Techs involve the use of his long, sticky frog tongue to grapple enemies. although transformed into an animal, Frog continues to wear human clothes, seemingly out of habit rather than apparent need. it is Iconic for his sage green cape, Frog also wears white britches, a belt fitted with a scabbard, boots, and blue gloves.
In his human form. Glenn wears the same clothes that his Frog form wears, a golden breastplate, a green cape, green gloves, boots, and white pants. however, Glenn appears like a tall young man with spiky green hair and a piece of hair sticking out in the front. He was described as handsome as a young man.
Childhood in Guardia
Glenn was born in Guardia, possibly in Truce or Dorino. His best friend was Cyrus, who was several years his senior. The children in his hometown often teased him for unknown reasons Glenn never fought back since it hurt him very emotionally to try and hurt another. Cyrus told him he was a marshmallow.
Several years later, when Glenn was a teenager, Cyrus declared that he was going to enlist as a royal knight of Guardia. He asked Glenn to come with him, but Glenn didn't feel he'd make a good knight. After Cyrus protested that Glenn was better than him with a sword, Glenn explained that he didn't think he could bring himself to hurt others.
In the end, Glenn came to Guardia to serve as Cyrus' aide. He would journey with Cyrus on many adventures, including a battle with the Frog King which yielded the retrieval of the Hero's Badge. Glenn and Queen Leene would become close friends, and as such, the young queen was always fearing for his own safety.
The Battle with the Fiendlord
In the year c. 590 AD, Cyrus, and Glenn departed to face the Fiendlord Magus. Together, they traveled to the top of the Denadoro Mountains to claim the Masamune from Masa and Mune. Cyrus would single-handedly managed to defeat the twin Mystics, and they offered him the use of the sword out of admiration for his skills.
Shortly thereafter, armed with the only weapon that could defeat him, Cyrus faced Magus alone. but for Glenn could only stand back and only watch and was afraid to get involved. Cyrus charged attack Magus but was blown back by his powerful magic. The Masamune would shatter in two pieces.
with Magus, in an act of utter spite, cast one final spell that killed Cyrus. with Glenn picking up the broken hilt of the sword, growing angry and vengeful. Magus remained unimpressed. Ozzie suggested that Glenn looked like an angry, hopping toad. Taking his general's advice, Magus cast another spell that transformed Glenn into an anthropomorphic frog form and flung him off the mountain.
The War with the Mystics
Since then, Glenn (now calling himself "Frog") has fought a one-man war against the Fiendlord's armies. He is consumed with regret and self-loathing over his own weakness in the fight against Magus and continues to blame himself for Cyrus' death. He dwells alone in a hidden grotto deep within the Cursed Woods.
The Kidnapping of the Queen
Ten years later, Frog learned that the Mystics has kidnapped Queen Leene, and goes in search of her. He calls off the search when Marle is found in Truce Canyon and is mistaken for the Queen. Continuing his investigation, he knows that the queen is still in danger. He arrives at Manolia Cathedral, where he meets up with Crono and Lucca and discovers the cathedral to be a secret Mystic base. Together, the three of them defeat the boss Yakra and rescue both the queen and the real Chancellor, whom Yakra had been impersonating for quite some time.
Rescuing them and returning to Guardia Castle, Frog departs once more, stopping only to stare at Marle's uncanny resemblance to the queen. Leene begs him to stay, but Frog bows respectfully and disappears back into self-imposed exile.
The Hero Returns
Along the way, Frog lost track of the Hero's Badge, the magic sigil that showed one's true strength and aided the wielder of the Masamune. The badge is found by Tata, who is taken to be the new Hero.
Frog wanted no more to do with the Masamune, the badge, or even trying to be a hero. All he could think of was how he was nothing like Cyrus. Recovering the Hero's Badge from a terrified Tata as well as the two shards of the Masamune, Crono, and company confronts him, saying that he is the only one who can wield the Masamune and defeat Magus. At first, he is unwilling to help them, citing his own weakness. They then discover the hilt of the blade, which leads them to Melchior. When the sword is reforged, they return to Frog's home and ask him to help them defeat Magus once and for all. After some flashbacks were shown Frog then joins the party permanently.
The Battle in the Fiendlord's Keep
with Crono, Frog, and their ally proceed to the Magic Cave, the only way to reach the Fiendlord's Keep. Finally taking hold of the Masamune, Frog uses its power to leave the foot of the mountain in half, opening up the long-sealed pathway to Magus. After facing his generals - Slash, Flea, and Ozzie - Frog and the rest proceed to the inner sanctum where they find Magus. Magus uses powerful magic against them, but Frog uses the Masamune to break his nigh-impenetrable magic barrier, allowing them to harm him. Their battle only weakens him, which causes him to lose control of his spell to summon Lavos. The creature begins to wake up too early, and the space-time distortion it causes sends them all hurtling through time.
In the time era of Antiquity, they learn that the so-called "Prophet" is actually Magus in disguise. They find Magus on the North Cape, and Magus offers Frog a chance for revenge. If Frog manages to kill him, the spell on him will be eventually broken and he will change back to his human form.
It is up to the choice of the player whether to slay Magus or allow him to join the company (the canon is that Frog spares him). Frog sheaths his blade, saying that killing Magus would not return Cyrus nor give him back his life.
The Hero's Grave
In the year of 1000 AD, Frog finds the restless spirit of Cyrus. In the past, they are able to repair Cyrus' grave which puts his spirit to rest. Proceeding to his final resting place, Cyrus' spirit descends and empowers the Masamune, making it, even more, stronger than ever.
Several endings of the game, particularly those that show the departure of the main characters back to their own time periods, have two variants based upon Frog.
Should the player decide to fight Magus the second time on the North Cape in the Antiquity, the spell on Frog would be broken, but not until the end of the game. When the group says their farewells on the last evening of the Millennial Fair, a tall, green-haired knight approaches them, thanking them for their help. Marle and Lucca realize that he is actually Frog transformed back into a human, and cannot help but admire how handsome he is.
A similar ending happens if you choose to fight Magus a second time and leave Crono dead. It starts the same with Marle and Lucca celebrating the last day of the Millennial Fair, then as you go to the two pods the gate bursts open with Gaspar, Ayla, Robo, and a long green-haired man. Ayla demands the Time Egg, but before Gaspar gives it to them he jumps back into the gate. The man explains the situation, then Marle and Lucca realize that was Frog now Glenn. Lucca then wants to follow the party using the Epoch for the sole purpose of hitting on Glenn, quoting: "Nya Ha Ha! Hey Frog! Why didn't you tell us you were a dish?" Then the ending part with King Guardia hanging on Nadia's bell happens.
If Frog spares Magus, the game ends with him looking off into the horizon on the peak of the Denadoro Mountains, reminiscing about Cyrus.
Defeat Lavos after giving the Masamune to Frog, but before fighting Magus, and the ending sequence will begin at Lucca's House. The group will celebrate their victory over Lavos. In the middle of the party, Frog slips away, saying he has unfinished business. The scene then switches to Magus' Castle. Frog moves through the Castle, easily killing Slash, Flea, and Ozzie. He moves through the castle traps and confronts the keep's master, Magus. The two battled to the death, knowing one of them will not walk away alive.
The sequence ends with an unknown silhouette perched on top of the keep. It is never revealed whether it is Frog (who has had the spell broken by Magus' death) or Magus who walked away from the victor of the duel.
Another ending shows Marle post-Lavos, confronting her father. Both she and her father have some unseemly attributes. They croak and hop like frogs, suggesting they were descendants of Queen Leene and Frog, although the relationship between the knight and his liege is said to be strictly platonic.
An ending exclusive to the FMV of the PlayStation and DS releases depict Frog transforming back into a human form. A large ceremony including all of the nobles of the court and the royal guard is held for him, and the King, wielding a jewel-encrusted sword, knight him. One note about his design in this ending is that his hair has been cropped fairly short; in the flashback prior to his transformation, his hair is depicted as much longer and is clearly tied into a long loose ponytail from a rearview.
Frog is a very skilled swordsman able to fight multiple enemies with ease. Upon meeting Spekkio, which can happen any time after the Masamune is reforged, Frog learns to use Water magic. He is also able to summon forth a powerful, giant frog to trample his enemies. Frog's ability to deal with a large amount of physical damage, heal and inflict magic damage makes him one of the most useful characters in the game.
Ice Water, a Dual Tech with Marle, is the first access to an all-enemy attack and makes the arduous trek up Magus' castle much simpler, but be sure to swap in a fire user before confronting Magus himself.
Frog's element is water, so he takes extra damage from lightning attacks.
Frog has a base critical hit rate of 23%.
Frog's Japanese name "Kaeru" is a pun as this can be read both as "frog" (蛙) or the verb "to transform, to change" (変える) as well as the English name Kyle. In addition, Ozzie's comment about Glenn's inaction after Cyrus' Death is, in Japanese, that he looks like a "frog glared at by a snake" (a Japanese idiom largely equivalent to North America's "deer in the headlights"). Thus he is transformed to match the idiom.
In the SNES version, Frog speaks in a grandiose, semi-Shakespearean manner, using words such as "thou," "thee" and "shalt," although strangely no one else from his time era speaks that way including himself when shown in the flashbacks as a human. It's interesting to the fact that in the Japanese version, he instead talks in a more complicated, unusual way that people speak in real life. he speaks in a "well-trained/disciplined warrior" tone of speech.
however, In the DS version, they changed him to speaking more normally.
Connections in Chrono Cross
In Chrono Cross there is a similar-looking, but an unrelated character named Glenn appears who was named after him. He also possesses as a Dual Tech with Serge named X-Strike, similar to the one performed by Crono and Glenn of the same name.