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Gillian, in Tag Force 1-3
Gillian, in Tag Force 1-3
English name
  • Gillian
Japanese translatedMamoru Hatsugokoro
Japanese name
Japanese初心はつごころ まもる
Base初心 守
Furiganaはつごころ まもる
RōmajiHatsugokoro Mamoru
  • Male
SchoolDuel Academy
DormitorySlifer Red
Tag ForceEssential Basics
Tag Force 2Back to Basics
Tag Force 3Never Forget Your Original Intentions
Video game debutYu-Gi-Oh! GX Tag Force
Appears in
PlayStation 2Yu-Gi-Oh! GX Tag Force Evolution

Gillian, known as Mamoru Hatsugokoro in the Japanese version, is a character appearing in the Tag Force series. He is a Slifer Red student.

In Yu-Gi-Oh! 5D's Tag Force 4, his name is given to Yasunobu Hamada.

In Yu-Gi-Oh! 5D's Tag Force 5-6, his name is given to Shuji Maruyama.


Tag Force[edit]

When the player receives Gillian's Deck Recipe, they also receive a "Skull Servant". Gillian is also the opponent for any test's practical section if the player's score is low.

Gillian partners with Rei for the Tag Force Tournament.


Tag Force 2-3[edit]

Strongly likes Likes Neutral Dislikes Strongly dislikes
  • Caviar
  • Fermented Cheese
  • Soba Noodle
  • Fermented Soybean
  • Dried Mackerel
  • Normal Egg
  • Fried Noodle
  • Curry
  • Cook's Sandwich
  • Any sandwich not listed
  • Steak
  • Sausage
  • Hamburger
  • Chicken
  • Ham
  • Carrot
  • Pineapple
  • Tomato
  • Kimchi
  • Lettuce


Gillian uses WATER Decks in the first two Tag Force games. His Deck in the first game is identical to the player's Starter Deck in that game.

In Tag Force 3, Gillian uses Warrior Decks. His first Deck is once again the same as the player's Starter Deck, but his later Decks are more oriented towards the X-Saber archetype.

Tag Force[edit]

Gillian's Deck in Tag Force is titled "Never Forget Where You Come From" (初心忘るべからず) in the Japanese version.

Essential Basics ★1

Tag Force 2[edit]

Gillian's Decks in Tag Force 2 and Tag Force 3 are titled "Never Forget Your Original Intentions" (初心忘れるべからず) in the Japanese version.

Back to Basics 1 ★3
Back to Basics 2 ★7
Back to Basics 3 ★7

Tag Force 3[edit]

Never Forget Your Original Intentions 1 ★3
Never Forget Your Original Intentions 1 - Side Deck

Never Forget Your Original Intentions 2 ★4
Never Forget Your Original Intentions 3 ★5