Takitsubo Rikou

Takitsubo Rikou (滝壺 理后) is a member of ITEM.

Personality
Her personality resembles that of Aisa, having a rather blunt personality. Despite the fact that she shows little emotion she cares about her fellow ITEM members and Shiage, whom she loves.

Plot
Chronologically, she appears in Toaru Kagaku no Railgun with the rest of ITEM to stop Mikoto from destroying a research facility. She helps Mugino hunt down their target only to become weakened due to the use of the drug, Body Clear.

In her fight against Kakine in vol.15, she supposedly tried to manipulate his AIM field as a attack against him, forcibly attempting him to lose control of his power and berserk, and also attempting to use his own ability against him. Though due to her condition and the difference in their power she still lost.

She arrived to Russia with Hamazura Shiage after hijicking a jet from Academy City in District 23, after that her condition gets worse and is handed to a doctor only to find out that she can't be healed with the current technology from Russia. Later Shiage tries to hide her while fighting against pirates next to a villager and a soldier.

Abilities
Her ability was the AIM Stalker which she uses to track down the esper, she needs to consume what's called Body Clear in order to use her power, however continued use of the drug has worn her body down to the point she would break down if she uses it again once or twice. She was developed through such a way she can only use her ability by consuming the essence, as part of a earlier project to create a Level 6 before the 'Experiment' involving Accelerator, and thus she can no longer be developed through 'normal' methods other espers go through.

She also states that her ability allowed her to steal other espers' abilities by memorizing their AIM, potentially allowing her to become the eighth Level 5 esper in Academy City. This fact was also mentioned by Kakine Teitoku after their fight, saying it's such a shame she had to rely on the essence to use her powers. She suffers from brain damage after fighting him in volume 15; as a result, she can no longer use her esper abilities.

Trivia

 * It is uncertain if Body Clear, the drug she uses to use her abilities, is a by-product of Telestina Kihara's research. However, both Body Clear and Crystallized Esper Essence seem to have the same effect on the user, and is also in the same form of medication.