What part of Founder Ymir each part of the nine represent and how they may influence their users.
1) The founding Titan
The founding Titans core powers is the ability to control Eldians, turn them into titans and have access to paths. This is Ymir's desire to be connected and loved by people. This I believe could make holders instinctively crave connection. As seen mainly with Frieda Eren and Uri.
The founding titan needing royal blood to command Founder Ymir shows how one of her cores is being in service to her people and king. Ymir enacts others wills over her own, trying to please her people. This shows in the founding titan to the founders wishes. Similar to how a controlling parent may influence their child. This stems from Ymir’s titans being akin to children she spawned. (Note when female founding titan holds enter their titan form they have fully skinned distinctive breasts)
2) The Female Titan
The female titan reflects how Ymir had to live under and oppressive patriarchal force, and how it cause herself and other to view her. First off it’s labelled as “female” due to the titans breasts. It lacks skin only being made of muscle or “meat”. Similar to how women and presumable Ymir herself are reduced down to their body’s.
The titans “special” ability of being heavily adaptable reflects how Ymir had to adapt to King Fritzs orders. This could cause Titan holders to be able to formulate plans and change on a whim.
The Female titan can call others titans to itself. However it can not control them, this could be reminiscent again to parenthood and the inability to completely control your children. Like how Ymir could not control her daughters unlike how she could control titans. Female titan holders may be more likely to be family focused. Wether it’s blood family or chosen family, reflective of how one of Ymirs expectations was to be a mother and faithful wife.
3) The collosus Titan
The collosus titan is Ymirs separation from feeling human. In her titan from it’s speculated to be 200-300 meters tall with visible bones. Meanwhile a typical collosus titan is 60 meters with only muscle and bone visible. This ensures it hardly has a human resemblance. This along with it being referred to as a god of death shows how the collosus makes users feel more titan than human. This I suspect stems from Ymir and trickled down onto how Titan shifters viewed themselves.
The collosus is slow and designed to push others away when attacking. It’s non-confrontational and so is it’s users. Not acting unless instructed.
The collosus comes from Ymirs feeling of isolation. Being the only one in her time to be a Titan shifter something distinctively other.
4) The armoured titan
The armoured titan is Ymirs desire to protect others, shielding themselves and herself. The armoured titan and its users shield others using their own body. Harming themselves to ensure others aren’t hurt.
It can be fast running to be a sheild.
The thick protection ensured Ymir couldn’t be killed or even hurt when a Titan.
It’s Ymirs will to live and stay unharmed. A users will to be alive directly correlates to how much protection is on the titans body.
It enacts onto its users a deep need to sheild others taking the brunt of attacks and a need to help them. It way also fuel its users will a need to stay alive.
5) The war-hammer titan
The war-hammer titan shows Ymirs creativity. Although in AOT the war hammer’s ability’s are limited to crafting weapons it presumably requires a knowlage and imagination to make those. Ymir was ultimately a child to a young woman who would have had an active imagination, the war-hammers creative abilities would have been one of her only outlets for this creativity. Holders of the Titan may have more imaginative minds.
The war-hammer is also a reflection of Ymir wanting to protect herself.
Tw for paragraph mentions of rape.
The crystal ball the war-hammer forms is designed to only protect its holder. This can be interpreted as Ymirs need to protect her body from King Fritzs rape and assault. Joogio here tumblr also brought attention to this analysis and their post is linked here —>
https://www.tumblr.com/joogios/784731327827230720/many-things-to-say-here-first-of-all-i-have-a
6) The attack titan
Very simply the attack titan is Ymir’s desire for freedom. She longs for freedom, for herself, her people and her daughters. This passes onto the users of the attack titan wishing for freedom.
It’s her most basic human desire. Leading the attack titan to be noticeably having a more human appearance then the other nine. As form of protection that eventually will be her saviour.
7) The Beast Titan
The beast titan represents how founder Ymir dehumanises herself, and how others view her as a beast, sinner and devil. This passing onto the users of the beast titan typically having low self esteem, low self images and a general low view of humanity.
Similar to the collosus the beast is a separation from humanity, but rather than being barley human it’s Ymir not viewing herself as human at all. This may be why beat titan features only appear once shes died. Ymirs final image of herself being something completely nonhuman.
The beast titan is typically weak as it runs on Ymirs base urges and a general distain for herself and others.
8) The Cart Titan
The cart titan is the most obvious in its affects on its users, causing exhaustion and muscle lethargy. The cart titan hold the ability to stay in its form for months at a time and to be able to shift rapidly. This may bring to light the conditions founder Ymir was forced to operate in. Working for king fritz for months at a time.
Ymir was an overworked child soldier and slave who passed down her ability to push through limits eight of the nine would have.
It’s use as cargo transport reflects how Ymir both in and out of titan form was made to transport and use equipment to build the Eldian empire. As well as being briefed as little more than a weapon. Cart titan holders may be more susceptible to want to commit hands on labour.
9) The Jaw Titan
The Jaw Titan similar to the armoured is Ymir’s desire to protect other by being their shield and weapon. However it differed from the armoured by being protection through self sacrifice. Jaw Titan users have a drive to put themselves in danger to protect others. This ultimately causes their death, similarly to how Founder Ymir died by using her body to sheild king Fritz.
The jaws agility comes from Ymirs need to be the one to attack first once shes been ordered and to be the first one to be hit deflecting attacks.
Tw for menstions of sa and rape
The crystallisation around the jaws hands/claws and mouth could also be read into as another ingrained defence mechanism against the rape Ymir would have faced. A passed down protection from sexual assault similar to the war-hammers crystal ball