Leo Dooley

* Season 4
* Season 3
* Season 2
* Season 1

**Leo Francis Dooley** is one of the five main characters and the protagonist of Disney XD's *Lab Rats*. He and his mother move into his new stepfather's mansion, where Leo discovers three bionic teenagers, Adam, Bree and Chase who end up becoming his best friends. In Season 3, Leo becomes bionic due to Douglas healing his arm after it was crushed by S-1 on Victor Krane's orders. He is one of the two biological children of Tasha and stepson and former Lab assistant of Donald Davenport, the brother of his adopted siblings, Adam, Bree and Chase and his half-sister, Naomi Davenport, the grandson of Rose, the step-nephew of Douglas Davenport, the step-cousin of Daniel and Marcus Davenport, and is best friends with Logan and Taylor. Leo is a former student at Mission Creek High School and currently a mentor at Davenport Bionic Academy, and was the team's Mission specialist before officially becoming an official member in "Rise of the Secret Soldiers". He is currently in a relationship with Janelle.

## Possessions

* **Security Orbs:** In the episode "Scramble the Orbs," Leo created them to protect his siblings from Victor Krane and his step-uncle and their creator, Douglas Davenport. However, the security orbs malfunctioned, as they were unable to tell the difference between a friendly threat and a real threat. They eventually destroyed themselves; despite it being a failure, Donald thought they had potential.
* **Capsule:** Leo created a medical capsule that would diagnose people's illnesses and the data would show up on his computer. It was based on Eddie's smart home system. ENded in failure when Leo accidentally transferred Eddy into the pill and it let take control of his mother's body
* **Exoskeleton:** Leo once went in his step-father's Exoskeleton to demonstrate it but Chase messed with it out of jealousy that Donald was paying more attention to Leo than him.  He later used it when storming into Douglas' lair.
* **Mission Suit:** Leo got one in "Rise of the Secret Soldiers" arc. Leo's is different than Adam, Bree and Chase's in terms of style. It is able to withstand any harshness of climate or temperature.

## Family

### Tasha Davenport (Mother)

Tasha is Leo's mother who he is rather close to. The premiere episode implied they had already been living in Mission Creek prior to her marrying Donald. Leo supports her marriage to Donald; however, Leo told his mother to stay away from online dating when they meet Adam, Bree and Chase for the first time and he sometimes wonders how they ended up together.

When Leo received bionic implants, Tasha was initially furious, but mainly with Douglas, and she often berates Douglas or Donald if Leo's bionics go haywire. She has chosen to support Leo for her son's sake. When Tasha revealed she was pregnant with her and Donald's first child, Leo was happy for his mother and gave her a hug, promising to protect his sister after she was born.

### Donald Davenport (step-father)

Donald is Leo's stepfather and has been since 2012. Since Leo's biological father is never mentioned, Leo appears to be close to Donald as his father-figure. Donald tries too hard to bond with Leo, and once blew it with him when Donald revealed to Tasha Leo's secret crush when Leo wanted the secret kept between them.

Leo mainly calls him "Big D" because of his position as head of the Davenport Household. However, Leo doesn't have the best relationship with him, even admitting he's not all that good. At the time of season 2 Leo and Donald appeared to get along better, as Donald begin trusting him with missions and being a part of the team. He is fairly protective of Leo as much as the lab rats, as he shouted for Douglas to leave his son alone and was relieved to see his son alive when Leo came in the middle of the battle between the Team and Douglas and Marcus Davenport.

Since Leo matured, Donald finally trusts his stepson, like allowing him to invent things in the lab without Donald in the room and allowing him to find sponsers for his J-Wing stunt. Donald was also concerned for Leo when he learned that his son had been gravely injured, especially when the family feared Krane had kidnapped Leo again; Donald was relieved to see his son and Douglas when they were cornered by Krane and Donald immediately asked Leo if he was alright. However, Donald was angry to learn that his brother gave his son bionics, fearing Tasha's wrath. The Bionic Academy is founded, Donald passes Leo over as a mentor and tells him he has to be a student instead. At the end of Season 3, Donald promotes Leo to a higher level, from beginner to intermediate. In "Unauthorized Mission", Donald is nearly killed trying out Chase and Sebastian's latest virtual reality stimulation, causing Leo to rush to Donald's side and look at him in concern. Unknown to them, Sebastian rigged the stimulation, hoping to get revenge on Leo, the rest of the Lab Rats by taking away their father.

Donald does consider Leo his son, according to the episode "Bionic Houseparty." In "On the Edge," Donald proudly announces Leo is the next mentor after he proves to be courageous in battle by rescuing their family from the Hurst Memorial Bridge. Leo was also happy for Donald and Tasha when they announced that they were going to have a baby girl together.

### Adam Davenport (older Adoptive brother/step-cousin)

Out of all their siblings, Leo and Adam appear to be the least close, but they care about each other as brothers. They first met in "Crush, Chop and Burn" when Leo accidentally discovered Donald's lab. In the show, Leo will sometimes get annoyed with Adam's stupidity and out of the two of them, Leo appears to be more responsible. Despite this, Adam loves Leo as much as he does his other siblings and will be protective over him, as one of Adam's hidden abilities showed up when he saw Marcus about to kill Leo again. They hang out together, such as "Adam Up." Adam also worried for Leo when his arm got crushed by Taylor and Adam drove the protesters (including Principal Perry) away from Leo with his breath ability. He was proud of his younger brother when he went on his first official mission with them.

Currently, Leo and Adam are running what is left of the Bionic Academy, allowing room for them to grow closer.

### Bree Davenport (older adoptive sister/step-cousin)

Bree is Leo's older step-sister/step-cousin, and they first met in "Crush, Chop, and Burn," where Leo accidentally stumbled upon her and her brothers. He was the first one to show Bree the real world and how to be a teenage girl. Bree makes it her responsibility as Leo's older sister to see her younger brother following the right path, as she told him to take the blame and tell Perry he cheated off of Bree on her test. Leo tried everything to restore Bree's chip, even going to Douglas, the man who originally created it, to help them.

Like Adam, Bree can be protective of Leo, as she was concerned for her brother when he was trapped in the training room with the rest of the bionic soldiers and was scared when Sebastian ordered them to take him out.

### Chase Davenport (Adoptive Brother)

Chase is Leo's cousin/step-brother and Leo appears to be closer to Chase than the rest of his siblings. They are a lot alike, given that they are the youngest members of the Lab Rats, are very intelligent and good with technology, close in age (with Chase being the oldest of the two) and both got bullied by Trent and picked on by Adam and Bree, and they both snuck Douglas into the lab at one point.

Leo and Chase meet in” Crush, Chop and Burn”, when Leo accidentally stumbled across a secret elevator and found a lab within his step-father's basement. Chase was the first bionic teenager Leo had seen and was scared of his unknown step-siblings. However, Leo grew more relaxed when Donald explained who the three siblings were and admittedly, both Leo and Tasha were disturbed by how Donald treated the kids, such as making them eat fiber pellets that fell from the top of their capsules into their arms. When Chase first met Leo, he could barely stand him but quickly warmed up to Leo when he took them to school and showed Chase (and Adam and Bree) the outside world for the first time. Leo establishes that Chase, Adam and Bree as his best friends and was sadden to see them gone when Davenport was going to send them to Facility X in the Frozen tundra. Chase called Leo the first friend they ever had (with Adam correcting them that Leo was their only friend. Leo admitted that in their short time together, he came to love them, which Leo unknowingly admitted to the Lab Rats when Leo thought they just robots at the time. Later, when Davenport and Tasha toldd Leo taht they sent the "robots" to a recycling department and went to rescue them. Chase was immediately concerned when he first saw Leo fall into the recycling bin and sprung into action to save his stepbrother, along with their other siblings. After seeing the kids use their bionics, Donald decided that the kids could stay and Leo was overjoyed. In "Leo's Jam," Later, Chase and Leo fall in love with the same girl, aloong with Adam. Despite winning Danielle, Leo chooses to apologize to Adam and Chase for sabotaging their chances with Danielle and calls them his brothers. Chase later acknowledges Leo as his brother in "Exoskeleton vs. Grandma," where Chase and Leo apologize to each other.

In "On the Edge," when Leo discovers a new ability called EMP generation with Taylor, Chase forbade Leo from ever using the ability because it proved to be too dangerous to use. However, the two disobeyed Chase, and used the ability again; however, the EMP generation resulted in Leo permanently blinding Taylor. The older Davenport brother scolded Leo for causing her danger and deems him unworthy of being a leader. Leo takes his brother's words at heart, especially after learning Taylor will never see again, and decides to quit the team and the academy and move back to Mission Creek. Chase never meant for Leo to quit, possibly thinking he had been a little harsh on his brother, and he felt that Leo should stand with them during the award ceremony because he was a hero just like them. Later, Chase and their family are trapped on the Hurst Bridge and Leo goes to rescue them. On the mission, Leo refuses to give up on saving Chase, who tells his younger brother to let go or the car will take him too; Leo refuses and saves his brother from falling and the two brothers hug each other, glad the other is safe from harm and finally reconciling. Afterwards, Leo is able to stand next to his siblings and later, Chase congratulates his brother to finally making it, claiming he couldn't be any more prouder than him.

### Douglas Davenport (Uncle)

Douglas is the brother of Leo's step-father, Donald, thus making Douglas his step-uncle. They were bitter enemies, but at the time, Leo did not know of his relation to Douglas until "Bionic Showdown."However, Douglas went to Leo for help about Krane and despite his past feelings, Leo decided to listen.Leo's the first to believe Douglas, who tells Leo that he must talk to Donald because his step-father will believe him.  Despite believing Douglas, Leo does not defend him and just watches as Donald orders for his brother to leave.

By the second half of season 3, Leo and Douglas were friends, especially after going to his step-uncle for help in fixing Bree's chip. After Leo's arm is crushed, Douglas shows concern for him and tries pulling off the ceiling beam that fell off of him and when he can't do that, Douglas goes to the firemen to save Leo. After learning from the doctor that Leo will never be able to use his regular arm again, Douglas refuses to let that happen and takes Leo to Krane's Warehouse and uses bionic components to save his arm.Despite them being on the government's good sode, Douglas urges Leo to keep his bionic arm a secret because they would take Leo away and Douglas would end up in Federal prison. He also reveals that he made a remote that turns Leo's bionics on and off for the safety of himself and others. Leo steals the remote and activates his bionics. Douglas realizes this and confronts Leo at school, where he sees that his nephew was trying to impress a girl. Douglas promises to teach Leo how to use his arm properly.

When Leo glitched for the first time, he attacked Douglas in his sleep. Chase began to blame Douglas for never giving Leo a capsule because he was responsible for giving the kid a bionic arm int he first place. He didn't want anyone to wake Leo up in fear for his nephew's safety because it could potentially make Leo explode. After the ordeal, Douglas gives Leo an arm capsule for him to wear in his sleep. Douglas made Leo Daniel's mentor because he thought he was responsible and later scolded Leo for giving his son a chip upgrade when he specifically told him not to and later, Douglas saved his nephew's life when he liquefied Marcus as he tried to fight Leo.

### Daniel Davenport (Step-Cousin)

Daniel is Leo's younger step-cousin. Ever since Douglas introduced Daniel to the Academy, Leo could relate to Daniel a lot, as he shared much of Leo's same experiences of feeling wanted in his family, and was reckless with his bionics much like Leo was when he first received his bionics. Daniel was glad to make Leo and his siblings' acquaintances, mainly because Daniel was glad to have more family members

Leo and Daniel grew closer because of their many similarities, as Leo told his cousin to give Douglas a chance. Daniel eventually became one of Leo's students, and he continued to teach him how to properly control his bionics.

## Friends

### Taylor

As S-1, Taylor and Leo used to be mortal enemies, and she tried to kill him at least twice and she was the main reason that Leo's arm was permanently damaged and why Douglas had to fix it with bionics. He later battled her in "Rise of the Secret Soldiers," where Leo managed to finally overpower her. However, because she was under the Triton App, Taylor did not recall Leo because she was a blank slate like all the other soldiers, meaning her actions of crushing Leo's arm was not of her own accord. Taylor met him again in "One Of Us," where Leo knocked her out because he thought she was a threat to his friends. However, the two decided to forget move on in the past and finally, they became friends.

The two became extremely close, afterwards, and discovered a new ability. By joining their hands, they could make a laser sphere so powerful it could knock out all the lights in the Academy. However, this new power caused Leo to accidentally disable Taylor and make her go permanently blind. Despite it being an accident, Leo quit the Bionic Academy and was haunted by what he had done to Taylor. However, Taylor did not blame Leo because it was just an accident. She later called Leo when his family was in danger, as they were trapped in a self-driving car and together, the two managed to save Leo's family by disabling the safety lock device on Daveport's limo, where Taylor told Leo that blinding her was only an accident

### Logan

“*I love you guys!*”
―Logan to his teammates
Logan is one of Leo's best friends and a teammate in his own team after Leo grew tired of living in his older siblings' shadow. It is revealed that Logan hero-worshipped Leo, inspired by how he was once a normal kid before becoming bionic.

Logan followed Leo's lead when they were rescuing Leo's family.

### Bob

Despite appearing in smaller scenes with Bob, they appear to be good friends due to their close relationship with Adam. When Spin goes to call Leo for help, Bob happily tells his brother to tell Leo that he (Bob) said "hi." However, Leo appears to enjoy teasing Bob at times, because in that same scene, Leo joked with Spin and Bob, taking a selfie with the two to prove how ridiculous they looked. He scolded Bob and Spin for deleting the mission and going on it on their own and despite teasing them about getting stuck in quicksand, Leo was able to pull them out while lifting a log with his bionic arm, thus saving the duo.

At times, Leo can get annoyed by Bob's stupidity as much as he does with Adam, as he groaned in annoyance when they both touched a skull that was poisoned with a virus Douglas created after Leo and his siblings had already dealt with the virus when it was taken in by Chase and Bree. Nevertheless, the two help each other, as Leo was able to convince Bob and Spin to help him escape the bionic soldiers when he was imprisoned with them by Sebastian, Lexi, and Tank.