 when she wants to be and was the one who told him to distract Finn. 

In I Love You, Goodbye, Kol arrives in Davina's attic while she is in mid-conversation with Josh. She questions him about his disappearance the day before and why he couldn't call her. He flirts that it's a "right spat they're having" and laughs if they're "going steady" before offering to make it up to her by helping to finish the dagger.
While in the Claire tomb sometimes afterwards, Davina and Kol set up the ingredients and start the process to turn the dagger into gold. She is unsure if she's ready, and he cheekily comments he has never completed the spell before but has never had a partner as powerful as her. They hold the dagger over the Bunsen burner as they begin to chant the spell. As they chant louder and the dagger becomes too hot, they drop it and are amazed as they reveal the spell worked. They begin to kiss which turns into a full blown make-out before unknowingly to them, Freya has began her own spell of reviving Finn, as he wakes and her spell finishes, Kol suddenly jerks back and his nose begins bleeding. Worried, Davina asks if he's okay to which Kol continues to deceive her about the hex, smiling and telling her the powerful spell takes it toll. He requests she hides the dagger before announcing they should celebrate, and asks her as his date to Hayley and Jackson's wedding. Davina accepts, on the condition they dance if there is music.
Afterwards, Kol is nowhere to be seen at the wedding as Davina arrives, although afterwards following the wedding party, Davina walks with Josh who discusses his boyfriend's new found hybrid abilities, she sadly responds "at least your boyfriend showed up". As Josh twirls her around, she notices Kol leaning against a wall and quickly begins to approach. He compliments her as "a sight" although Davina immediately notices something is wrong after she touches his ice cold hand. He then finally reveals to Davina's horror that Finn hexed him after they rescued Josh, and that he thought he would've been okay, although now realizes he's running out of time as Davina holds back her tears.
Back inside the Claire tomb, Rebekah and Davina deliberate on ways in which they can break Finn's spell or jump Kol into another body. Kol interrupts them, asking quietly if Rebekah can give him and Davina a minute alone. After his sister leaves, Kol stands and offers his hand to Davina, telling her "he owes her a dance".
Their slow dance continues out into the cemetery outside, and Davina begins to cry against his shoulder. As Kol pulls her closer and caresses her cheek, as he begins his goodbye and tells her; "I know we're in a cemetery, and I'm terminal, but you gotta admit the stars are lovely. Under the same stars, there's some guy, and he's with this girl. And he has all the time in the world, and he's right.  before they laugh sadly although short lived as Kol begins to cough up blood.
She kisses his hands when he stands back up, and after one last look he turns and tells her he should be alone for "what happens next". While Kol rapidly deteriorates with Rebekah, Elijah and Klaus beside him, Davina desperately attempts another spell to save him. After Rebekah lets him know that they will consecrate his body in order to somehow bring him back, Davina's spell failed once more and she rushes towards him. He takes her hand and caresses it says "it's okay" and he isn't scared to try and bring comfort to her. He then smiles at her before laughing, although dies shortly after and Davina is left devastated as she cries over his body.
In Night Has A Thousand Eyes, Davina is seen mourning Kol at a grave bearing Kaleb's name, in the crypts of the cemetery. Klaus approaches her to ask for a favor in regards to Mikael and Davina tells him that she is too busy mourning another dead boyfriend to help. Hearing this, Klaus reminds her that she is not the only one to be grieving Kol before making her an offer. He explains that he is in possession of the ashes of Kol's original body from the first time he died, and that if she helps him with Mikael, he will give her the ashes as they are a necessary part of the spell to bring him back to life. Davina agrees to this and helps him locate Mikael, as well as create a weapon to kill Dahlia, in exchange for his remains.
In When the Levee Breaks, Kol is mentioned by Davina when Aiden and Josh approach her to create an object that will prevent Hope from using magic so that Hayley and Jackson can run from Dahlia with her. Davina grows sad and says to them that if Kol had asked her to run away with him before he was hexed by Finn, he wouldn't have had to ask her twice. Marcel later approaches Davina to convince her to help them dagger Klaus, where she tells Marcel that while he helped save her from Eva, he wasn't there for her when Kol died, and that's when she needed him the most, even if he didn't care for their relationship. She is reluctant to hand over the dagger as Kol gave it to her for her for protection after he was gone, but despite this, she hands over their dagger at the end of then episode, allowing Elijah to dagger Klaus, meaning that after centuries of trying, Kol actually succeeded in creating what could put Klaus down even if he was unable to see it happen.
In Wild at Heart, Davina uses magic to cross over into the Ancestral Plane where she runs into Kol who is hiding from The Ancestors.
He takes her to Rousseau's where Davina shows Kol the spell which can bring him back to life. Recognizing that it's The Strix's work, Kol lies to her, saying it's a fake, however Davina calls him out on the lie. Kol tells her she needs to find other way one that doesn't involve The Strix however the lights start flickering and thats their cue to hide from The Ancestors who are coming in the bar.
Knowing Davina needs to get back to her physical body back at in her old room Kol takes her throughout the back alleys to get there, but Kara shows up and attacks them. Ariane comes to their rescue and sends Kara away. However at this point more ancestors know their location and Kol distracts them so they wouldn't get Davina who makes it back to the psychical plane with Ariane.
In Heart Shaped Box, Davina summoned Kol's spirit and he was happy to see her but disappointed to see she had joined the Sisters. She assured him it was a means to an end but their reunion was interrupted by Aya. Kol was familiar with Aya, surprised that she hadn't been killed yet. Aya told him he would remain a ghost unless he helped them with the final ingredient to the de-linking spell. Kol said he'd talk, but only to Davina. She secluded that the missing ingredient was Hayley's heart. With lead the remaining sisters to go kill Hayley. Kol told her to use the candle and Kol's spirit to knock herself out and her connection with the Sisters would bring them down too. Davina took his advice and was knocked out. Kol crouched beside her, lamenting that it was definitely their worst date ever. When Davina awoke, Kol sat beside her and said watching her sleep was the best experience he had had in months. He told her he appreciated her efforts to bring him back but that Aya never kept her promises. When Davina confessed her love for Kol, she kissed him just as the candle went out and he vanished.
In A Streetcar Named Desire, after Davina Claire successfully unlinked Klaus from his sire line, the spell and amount of magic drained from Klaus created a Nexus Vorti. Davina, having saved the blood of both Elijah and Klaus from the de-linking spell, used the blood of the two brothers, along with Kol's ashes, as the ingredients for the spell to bring Kol back. This was the same spell Rebekah wanted to use before Aya had her witch destroy it to spite Rebekah. Once combined, Davina channeled the new Nexus Vorti energies for the power to cast the spell, and successfully resurrected Kol Mikaelson as an Original Vampire. Kol smiles at Davina, and tells her he always had faith in her.
In An Old Friend Calls, Kol awoke after being asleep for three days following his revival, saying that his body being reconstructed from ash had taken a lot out of him. Davina was overjoyed to see him standing but he revealed by putting his hand in sunlight that he had returned as an Original Vampire, his original body brought back to the state it was prior to his first death. Davina was concerned, having only ever really known Kol as a witch. Kol knew that Davina had heard the stories about how he was a violent lunatic as a vampire but assured her that he'd be able to control himself now that he had a reason to be better. He asked her to make him a new daylight ring so they could pay his family a visit, despite her concern that Klaus would kill her for breaking his sireline. When they arrived at the compound, Klaus immediately attacked Davina but was thrown off by Kol, who greeted his brother with a cheeky smile. Klaus was shocked by his brother's return and Elijah and Freya soon joined him, all in disbelief. Davina