Daigo Madoka/Ultraman Tiga

A member of G.U.T.S who gains the ability to transform into Ultramn Tiga after coming across the Tiga Pyramid.

Daigo/Tiga Provides examples of:

• Critical Annoyance
• Did You Just Punch Out Cthulhu?: The Big Bad is a Cthulhu Mythos Eldritch Abomination named Gatanozoa, who in the Cthulhu Mythos was actually Cthulhu's son. In this series he's dubbed The Ruler Of Darkness. He defeated Tiga's entire race eons ago and beats Tiga easily in their first fight. In the end, Tiga, merged with the light of every child on Earth to become Glitter Tiga, overpowers Gatanozoa and completely obliterates him.
• Hand Blast: Various energy attacks
• Henshin Hero
• Light is Good: As a being of light.
  • Dark Is Not Evil: His forms in Final Odyssey, most especially Tiga Dark.
• Multiform Balance: The first Ultra Series hero with such an ability
• New Powers as the Plot Demands: Not very frequently, but demonstrates this trope on a few occasions, such as using an electrical attack in epsiode 45
• Theme Music Power-Up
• Transformation Trinket: The Spark Lance

Rena Yanase

• Ace Pilot: Although with rather limited effectiveness against the various Monsters of the Week.
• Official Couple: With Daigo. Especially in the post-series films.

Megumi Iruma

• The Captain: of G.U.T.S

Seiichi Munakata

• Guy In Back: He gives commands while sitting at the back of the jet.
• Number Two

Masami Horii

• Kansai Regional Accent
• The Smart Guy

Tetsuo Shinjoh

Jun Yazumi

Various monsters faced by G.U.T.S and Tiga throughout the series.

The monsters in general provide examples of:

• Kaiju
• Monster of the Week
• People in Rubber Suits

Miscallenoues specific monsters provide examples of:

• Monster Is a Mommy: Inverted in episode 46. The monster was looking for its mommy.
• Robotic Reveal: Geozark in episode 43.
• Taken for Granite: An ability used by the Gakumas in episode 2.
• The Undead: Sealizer was first discovered as a corpse.
• Weakened By The Light: One of the Standel aliens in episode 17.

Gatanozoa

The Ruler of Darkness.

• Big Bad: of the series.
• Dark is Evil
• Eldritch Abomination: The character is even derived from the Cthulhu Mythos.

Keigo Masaki/Evil Tiga

A Mad Scientist descended from the ancient race. He has DNA similar to Daigo.

• Back for the Finale: He is enlisted to help revive Tiga who had reverted to a statue after battling Gatanozoa.
• Evil Counterpart: As Evil Tiga, his powers are similar to those possessed by Ultraman Tiga in Multi Type.
• Hand Blast: His own energy attacks
• Light is Not Good: Evil Tiga is a being of light, similar to Tiga. Although his energy attacks take a more "dark" appearance compared to Tiga's.
• Mad Scientist