One common theme is the unspoken or hidden feelings they might have for each other. Since in the original series their relationship is more of a friendship with some underlying tension, fanfictions often explore what could happen if those feelings turned into love.
One common theme could be the exploration of their relationship in a new light. With Tatsuki being pregnant, it might focus on how Ichigo and Tatsuki handle the upcoming changes in their lives, like preparing for the baby. Another theme could be the reactions of their friends and family. They might be surprised, supportive or have mixed feelings.
One common theme could be the exploration of their unspoken feelings. Since in the original series there are some underlying emotions between them, fanfictions often delve into that. Another theme might be the idea of 'forbidden love' as there are other relationships and storylines in the original that could make their relationship seem a bit off - limits in a sense.
Another theme is the exploration of different worlds. Since Tatsuki is from a different world in some fanfictions, there's a lot of exploration of how the Naruto world and Tatsuki's original world differ. This can include differences in culture, fighting styles, and magic or chakra systems.
Common themes include mutual understanding. The fanfictions often show how Tatsuki and Chizuru come to understand each other on a deeper level. There can also be themes related to loyalty, where they are loyal to each other through thick and thin. Additionally, some fanfictions might have a theme of adventure, with them embarking on an exciting journey together which further strengthens their bond.
Growth is also a big theme. As they interact more, both rukia and tatsuki grow as individuals. For example, they might become more confident or learn new skills. And sometimes, there's a theme of sacrifice, where one is willing to sacrifice for the other in the story.
One common theme is the overcoming of differences. Since they come from different backgrounds in the story, fanfictions often explore how they bridge that gap in their relationship. Another theme could be protection. Ichigo might be portrayed as protecting Hiyori from various threats.
You can try searching on fanfiction websites like FanFiction.net or Archive of Our Own (AO3). Just type in 'Ichigo and Tatsuki' in their search bars, and you'll likely find a variety of fanfictions related to them.
One common theme is the discovery of love. Since they start as comrades, the fanfictions often show how they gradually realize their romantic feelings for each other.
One common theme is the struggle between love and duty. Ichigo often has to balance his feelings for someone with his responsibility to protect the world. Another theme is the idea of forbidden love. Sometimes his love interests might be from different factions or have secrets that make their relationship difficult. And of course, the theme of self - discovery through love. As he falls in love, Ichigo also learns more about himself.
In fanfictions about their love, a frequent theme is the struggle against the odds. Given their different natures and the rules of the Soul Reaper world, being together is not easy. There are also themes of loyalty and trust. They trust each other completely in battle, and this trust extends into their romantic relationship. Additionally, the theme of forbidden love can be present. Since there are likely rules against a human and a Soul Reaper being together, their love is a defiance of those norms, which makes it all the more exciting and passionate.