Rod Reiss

Rod Reiss (ロッド・レイス) is a member of the true royal family within the Walls operating from the inner lands of Wall Sina. He is the father of Historia Reiss.

Human form
Rod, like his daughter, is a rather short person with blue eyes. Though unlike his daughter, he is a slightly over weight man, with short, jagged, black hair and a thin black moustache. He typically is seen wearing a white button up shirt with a black pull over vest, black loose pants and black dress shoes.

Titan form
Rod Reiss' appearance as a Titan retains practically nothing of his human form, except he is still a male-like Titan. He grows to the point of becoming the largest Titan ever known, a class, twice larger than the Colossal Titan and eight times larger than the regular "large" Titans.

However, his body is quite disproportionate, having a small head and small and very thin limbs for his size and thus being unable to stand up, needing to walk on all fours and looking down permanently. He is also notably skeletal, with most of his bones clearly visible.

Like the Colossal Titan, his body generates lots of heat and moves slowly due to his size, and is always releasing jets of steam. The heat he produces is so high that the trees burst into flames when he approaches.

Personality
Rod often appears to have a calm, yet slightly worried demeanour. He speaks with great certainty and intelligence about the events of his daughter, Frieda Reiss, and his uncle, Uri Reiss, when they obtained and lost the Coordinate power. Rod maintains a level head throughout most of his time with Historia, Eren Yeager, and Kenny Ackerman. He even gathers his composure after Kenny grabs him and begins shoving a knife down his throat. However, when Historia flips him, crushes the serum, and bashes his claims of god, he becomes erratic and panicked. After the syringe is shattered on the ground, he begins lightly crying and desperately licks it off the floor so that he may become a Titan himself.

History
Rod Reiss conceived Historia with his one of his maids. When Historia was discovered, his mistress and daughter were exiled to a land that he leased to Historia's maternal grandparents.

On the day that Wall Maria fell to the Armored and Colossal Titan's attack, the entire Reiss family went to a chapel to pray in the underground secret area. However somehow Grisha Yeager appeared and engaged Frieda Reiss in combat. Though Frieda possessed the powers of the Titan she was eaten by Grisha through the neck, and Grisha then proceeded to kill the rest of the Reiss bloodline with only Rod escaping, blindly fleeing as his family was killed.

One day Rod came to get his daughter and inform her that she would be living with him from now on. Kenny Ackerman and the 1st Brigade of the Central Military Police intervened and swarmed around Historia and her mother. Kenny questioned if Rod was familiar with these two women which he then denied. Rod watched as his mistress' throat was slit while she denied being Historia's mother. When the former serial killer moved in to kill Historia, Rod suddenly proposed having her enrol into the Survey Corps and hopefully die in battle. Seeing this as a fitting alternative the Central Military Police agreed to his demand. This was revealed later to be just a charade invented by him, as up until that point the MP making demands of the King seemed somewhat peculiar, and later on Kenny acknowledges having gone along with Rod's plan to get her into the Scouts. Presumably Rod left with the Military Police.

The Uprising arc
Rod is later seen siding with Kenny in a plan to kidnap Eren Yeager and Historia, eventually succeeding, keeping Eren chained in a dungeon of some sort. For an unrevealed reason he says he cannot become a Shifter, but whether this is true or not, if there is something to do with the bloodline or if it is just his personal choice is unclear. His relationship with his brother, the host of the Coordinate before Frieda who was apparently Kenny's benefactor, is unknown.

He tries to convince Historia by telling her about the murder of her brothers and sisters at the hands of Eren's father and revealing her the true power of the coordinate, which would allow her to stop the titans once and for all. He also says that no other king has ever tried to stop the titans for unknown reasons and the only thing that a normal person can do is pray at the monarch. Rod compares the monarch which God, which disgust Historia and makes her to reject the serum, the coordinate and to spare Eren's life. After failing to convince Historia to inject herself with the Titan fluid and eat Eren, he himself scrounges the fluid off the floor as he watches Historia free Eren. After ingesting it, he turns into a gigantic Titan considered by Levi and Armin to be bigger than the Colossal Titan

Rod Reiss' Titan then proceeds to ignore the Survey Corps members underneath the Reiss Chapel and begins crawling towards Orvud District of Wall Sina, hypothesized to be drawn by the larger number of humans in that area. He arrives there at dawn, when a group of Garrisons and Survey Corps members are waiting for him.

Relationships

 * Historia Reiss - Rod is Historia's father, though she is an illegitimate child who is not accepted as a suitable heir to the Reiss Family and thus Kenny Ackerman was charged with her death and the death of Historia's mother. Rod came to get her to live with him, but the Military Police interfered and rather than take back his daughter, Rod was forced to propose an alternative where his daughter's chances of survival would be extremely low rather than see his daughter's death before his eyes. It is thus implied that Rod Reiss may actually care for his daughter. When Eren and Historia are captured, Rod Reiss embraces Historia with tears in his eyes, saying that he is sorry for what is happening, surprising Eren and Historia. The reason for this, may well be his intentions for one day giving Historia the powers of her half-sister.