Kryptonite Factor: Extreme cold. Also, he could run out of energy if he overexerts himself.
One Hero, Hold the Weaksauce: He lacked a Color Timer (or a time limit in his true form, for that matter), unlike his predecessor. That made him more powerful in comparison. He was still weakened by extreme cold and could still run out of energy and sustain severe injuries if faced with a powerful enough enemy.
Honor Before Reason: Will keep a promise to be present during a sick child's surgery ("The brave one") and defend Earth ("The world's greatest invasion"), no matter if he's injured or in mortal danger.
Reality Ensues: His superior warned him not to transform even as Pandon attacked the UG. After he fought Pandon to defeat the first time (and was curb-stomped throughout), he turned back into Dan and collapsed with a head injury, right where the kaijuu had kicked Seven.
My Beloved Smother: In "Fly North!", Mrs. Furuhashi pretends to be ill so her son would visit her in Hokkaido and maybe even quit the Ultra Garrison. Upon hearing this, he went back to work. She then drops by for a visit just as he is about to crash his plane with an airliner thanks to the Kanan aliens.
Whatever Happened To The Mouse: The ending of his second and last fight in the series (against the Ultraseven Robot) is rather abrupt. Also, he is not mentioned again after Episode 46. Dan didn't even retrieve him then.
Child Soldiers: His plan was to turn children against grown-ups using weapons disguised as toys.
Improbable Weapon User: Children who got his toys also got a badge that activated such toys as weapons at his command. Tanks and guns would shoot live bullets, planes would fly by themselves, and so on.
Just Between You and Me: He told Dan and Soga his plan in detail before activating his killer toys in the toy store.
Mad Scientist: Justified, as he built killer toys and brought a mannequin to life to kill Dan.
Mind Control: The badge would also hypnotize its owner, turning him/her into a Child Soldier.
The (unintentional) negative association of this alien with victims/survivors of the atomic bomb got this episode banned.
Once they found out that children's blood was more beneficial to them, they lured lots of children to a building, where they quickly got desperate (thanks to the Ultra Garrison's presence), revealing their true form, and scaring them to death.
Race Against the Clock: Nogawa placed several small yet powerful bombs (one was powerful enough to blow up the base!) inside the UG compound that would all go off at 6AM, right at shift change. Dan had one attached to his leg, even after transforming!
Alien Invasion: Prote's plan, starting with stealing the location of secret Ultra Garrison bases.
Bitch in Sheep's Clothing: He gained Mr. Ichinomiya's trust when others mocked his experiments, set him up as his assistant, and invited him to leave Earth when all was said and done. He just didn't say what the extent of his research was.
Creepy Twins: Whenever they encounter Dan/Seven. A non-human version.
Crucified Hero Shot: Their trap for Seven: a clear cross appearing out of thin air. This trope is the Cliffhanger of Episode 39.
Dangerously Genre Savvy: They figure out Seven runs out of energy at times. Also, they are convinced that, instead of killing Dan, Seven's death should be witnessed by the people of Earth, making their surrender easier.
Death By Genre Savvy: Seven was saved by the Ultra Garrison by recharging him with Applied Alien Phlebotinum, which the aliens couldn't even steal when they had the chance. Once Seven broke out of the cross, he used his energy attacks to curbstomp their meager space fleet.
It didn't occur to them to post another pair of giant-sized Creepy Twins near the execution site.
They didn't anticipate the UG would burrow underground to thwart the execution.
They couldn't tell the McGuffin they stole was fake, either.
The execution site was close to the spot Seven was captured on.
Leitmotif: Three of them: an echoing guitar (Seven Vs. Aron); a sinister, slow piano piece (Dan's nighttime encounter); and a dramatic brass number (Seven's fight and capture). Dan's encounter scene had all three tunes, as well as the Ironic Echo above.
No Sell: Seven's attacks only serve to wear him out and absorb his energy attacks.
Does This Remind You of Anything?: Their living conditions are reminiscent of communist countries. There are soldiers, like Robot Commander's bodyguard, decked out in uniforms similar to DPRK and old USSR military uniforms.
Spot the Imposter: After fighting to a draw, Seven and the knockoff play a mid-air game of chicken, resulting in a collision. Then the survivor flew under the Salome's getaway boat and took off with it. Suddenly, there was an explosion in the horizon; the real Seven had fooled the aliens and blown them away.
In ancient Roman religion and myth, Janus (Latin: Ianus, pronounced [ˈiaː.nus]) is the god of beginnings and transitions, thence also of gates, doors, passages, endings and time. He is usually depicted as having two faces, since he looks to the future and to the past.
Hoist by His Own Petard: He tried to use the Eye Slugger against Seven in both fights. Seven used the weapon against him.