Anime/A

A

 * A Little Snow Fairy Sugar: It deals with the life of a German teenager and her friend fairy (chibi) called Sugar.

Ah

 * Ah! My Goddess!: While the manga in Japanese is better known as "Ah! My Goddess!", in the West it is known as "Oh My Goddess!", and according to the rules, we must prioritize the name that has been given to it in the West. However, the anime, both in Japan and in the West, are called the same: "Ah! My Goddess!". In the anime version, there is 5 episodes that deal the relative giantess theme.

Ai

 * Aika R-16 - EP3: A giantess Karen (clone) appears in a dream sequence.
 * Aikatsu Stars - EP13: The protagonists see a film in which they themselves participated. This film is about a fairy who must dismiss her other fairy friend from a kidnapping. There are several para-GTS scenes with several of the characters in the series.
 * AIUEO Fairy Tales of the World - EP11: A 10-minute animation about Alice in Wonderland for a set of videos dedicated to teaching English to Japanese children.

Al

 * Alice in Wonderland (1983): An anime adaptation of Alice in Wonderland, including Through the Looking-Glass. There are 10 episodes whose have relative giantess theme scenes.

Ar

 * Ariel: Microfranchise that deals with a giant robot of feminine aspect.
 * Armored Troopers J-Phoenix PF Lips Team - EP3: The protagonists land on an island that is part of enemy territory, but they are not detected. Taking advantage of the fact that they have not seen them, they decide to steal from their enemy, but on their way they stumble upon a mecha, called Kokoro, that looks very human and feminine with human feelings (love).

As

 * Astro Boy: Tezuka Osamu's masterpiece.
 * Astro Boy (1980) - EP18: The ship where Astro Boy travels is kidnapped and his human friends are taken hostage. These humans are made to undergo several size changes. There is a brief scene para-GTS.
 * Astro Boy (2003) - EP14: An miniature enemy robot infiltrates the body of Astro Boy's sister (she is also a robot), so Astro Boy must use a miniature robot of himself, enter the body of his relatively gigantic sister (to be more specific: para-gigantic) and destroy the enemy robot. There are brief moments where you see Astro Boy interacting with the outside of his sister's body, and a very brief scene where he interacts with an adult human woman. Much of the episode you can see Astro Boy inside the body of his sister, but perhaps this does not interest the GTS community.

At

 * Attack on Titan: a.k.a. Shingeki no Kyojin, is an anime where humanity is attacked by beings with giant humanoid forms called titans, who eat people. From the middle of the first season appears a titaness, which is very powerful and kills several soldiers.

Az

 * Azumanga Daioh - EP08: It is an episode where the strange dreams of each character are explored. One of them has a very short para-GTS scene. Another is a reference to Ultraman, despite not having growth.