This is Vanessa, brainwashed and controlled by Parasite Fusioner but you can notice the Parasite as a necklace. Dueling against Kaito.

Kaito and Vanessa: Duel!
Kaito: I shall start first, I summon Cipher Wing and I shall end my turn with two cards face down and end my turn. Without me you can't do anything sister
Vanessa: I cannot do anything without you! That's what a brother will tell to his sister! Stop playing around with me! My turn! From my hand I summon Sun Magician - Orange (atk: 1900 Def: 1700)! And when there's a level 4 or lower Sun Magician I can summon another Orange and Midlight (atk: 1000 Def: 100) together. Appear before us! Midlight and my second Orange! And when Midlight is special summoned from my deck I can add a Brilliant Light (atk: 1300 Def: 0) to my hand and also special summoned with another Midlight! And later I activate the effect of Brilliant Light! When there's 4 or more Sun Magician in my field I can change the levels to 6! And I shall overlay the level 6, both Orange, Midlight and Brilliant Light!

"The mighty being born from the Sun, it's time to show your magic and bring the hope and light to the battlefield"
I XYZ summon! Rank 6, Sunshine Magician (atk: 2000 Def: 1700)
I activate the effect of Brilliant Light when it's turn into a material It can raise Sunshine Magician attack points! (2000 > 3300)
And for every overlay unit i can inflict you 200 points of damage!
T

ake this, brother! Raising Sun!
Kaito: (grunts) (LP: 4000 > 3300)
Vanessa: Without you by my side I can't do anything! Don't say that again! Hmph! Turn end
Doktor: Amazing, Amazing. Tearing apart a bond between brother and sister really amazing!
Kaito: My turn, I summon another Cipher Wing and when I control a Cipher monster I can special summon this car, Cipher Biplane! And with it's effect I can change all the levels of my Cipher monsters to 8
Vanessa: That won't happen! I activate the effect of Sunshine Magician, by using one overlay unit I can target a card which has a high level and I can destroy it. I select Cipher Biplane and it's attack points goes to you as damage! Sun Fall!!!!
Kaito: (LP: 3300 > 2300) When Cipher Biplane is destroyed I can banished and add a Cipher Wing to my hand and normal summoned. Later I release it and all the Cipher monsters level turn to 8
Vanessa: Tch!
Kaito: I overlay my two level 8 Cipher Wing!
"Galaxy shining in the darkness, Embody the demon of revenge and become my very servant! I Xyz Summon! Descend! Rank 8! Galaxy-Eyes Cipher Dragon!"
Battle! I attack Sunshine Magician with Galaxy Eyes Cipher Dragon!
Vanessa: I use the effect of Brilliant Light in the graveyard! I can return this card to my hand and special summon it and the attack is only directed to her!
Kaito: But you will take damage!
Vanessa: (shrieks) Tch! (LP: 4000 > 2300)
Kaito: Vanessa!
Vanessa: Tch! You will end your turn? You have nothing else to do!
Kaito: Yes, I have In the next turn. I will definitely save you and bring you back cause you're the only member of our family and I don't wanna loose you!
Vanessa: I don't belong to no one! Neither to you, i'm not an object!
(In her subconscious mind: on her knees and shedding tears)
Kaito: I end my turn with 2 cards face down
Vanessa: My turn! (Looks her card and it's Parasite Fusioner and her necklace starts to react) Hmph! I activate the effect of Sunshine Magician, for every overlay unit I can inflict you 200 points of damage! Take this! Raising Sun!
(In her subconscious mind: Eh? B-Brother! Why?! Why my brother?!)
Kaito: (LP: 3300 > 2900) This amazing, even brainwashed, you're still using your own deck only an only brother will understand her sister's strategy
Vanessa: Hmph, don't forget those words. I activate the quick spell magic, Sun Song! This card allows me to summon a lower level monster in attack position! I shall special summon Parasite Fusioner!
Kaito: W-What is that?! That's not Vanessa's monster!
Vanessa: Too late to surprise! When Parasite Fusioner is special summoned, I can do a fusion summon without the card Polymerization!
Kaito: What?! Vanessa will do a fusion summon?!
Vanessa: I will fuse Sunshine Magician and Parasite Fusioner!
"The mighty magician born from the light of the sun, become one with the inner voice and release your dark magic and show us your true form, I Fusion Summon, Appear before us! The Sun Magician born from the Abyss, Sun Magician - Dark Sunshine (atk: 2500 def: 1000)"
When a Fusion monster is summoned Parasite Fusioner turns into an equip card and when Dark Sunshine is fusion summoned, for every overlay unit Sunshine Magician haved becomes it's attack points (2500 > 2900)
Kaito: It's impossible that Vanessa make a Fusion summon, now I understand perfectly, that insect type monster is the one controlling her, there's no mistake
Vanessa: Battle! I attack Galaxy Eyes Cipher Dragon with Dark Sunshine!
Kaito: Why?! Galaxy Eyes has more attack points
Vanessa: I activate the effect of Dark Sunshine! When she attacks it's attack points rise to 300 (2900 > 3200)
Kaito: Trap card, activate! Cipher Shield! When I control a Cipher monster I can negate the destruction of Galaxy Eyes and I take no battle damage!
Vanessa: Tch! But I activate the effect of Dark Sunshine! Once for turn I can inflict you 400 points for every card in the graveyard
Kaito: As longest, Cipher Shield is activate I take no effect damage!
Vanessa: (gasps) Tch! But I target to Galaxy Eyes Cipher Dragon to activate my Permanent Spell Card, Sunlight Strike! With this card the targeted monster cannot attack my monster in 3 turns. I end my turn with this
Kaito: My turn, Oh, do you remember Vanessa?
Vanessa: Hm?
Kaito: When we we're in the Resistance camp

(Flashback)
Vanessa: (getting in the tent) Brother? Are you ok?
Kaito: Vanessa, what's wrong?
Vanessa: No, I was very worried and I came here to see you
Kaito: I'm ok, I'm just sad
Vanessa: Why?
Kaito: Our comrades are getting carded one by one and we're losing our members, and I want to crush those Academia soldiers! (Tightens his fist)
Vanessa: (holds his hand) Don't be like that, remember that revenge won't bring our comrades
Kaito: Vanessa....
Vanessa: I want to have my comrades back again but I don't want to fight for revenge all what I want is peace and happiness for this place
Kaito: Vanessa...you
Vanessa: If I get captured by them I want you have this (gives him a card)
Kaito: Why?
Vanessa: This is a promise, if I get captured by Academia, I want you promise me to fight for peace and for the happiness of Heartland. Because please I don't want you fight for revenge. I'm sure that we will end this war forever and we will see our family again
Kaito: (holds her hand) I promise, Vanessa. And I will protect you with these hands
Vanessa: (smiles) Brother.....
(Flashback Ends)

Kaito: When you we're captured, my anger grew and I was blind because of the hate. But when I met Yuya Sakaki and the Lancers, I realise that I was breaking your promise and thanks to them I realized and now I will use my power to bring peace and happiness.
Vanessa: Cool story brother, but hurry up
Kaito: I will win this duel and bring you back and together with the Resistance we will gain our peace. activate the magic card Sun Miracle!
Vanessa: What?! That's my card?!
Kaito: You gave it to me to make peace and happiness and I will use it now. By sending a card to my graveyard I can add to my hand a Rank Up Magic to my hand. I added to my hand Rank Up Magic - Cipher Ascension! And I target Galaxy Eyes Cipher Dragon to Rank up.
"Galaxy shining in the darkness. Release the forever unchanging light and become the beacon that illuminates the future! Rank-Up Xyz Change! Descend, Rank 9! Neo Galaxy-Eyes Cipher Dragon!"
Vanessa: Tch! Now that Galaxy Eyes Cipher Dragon has been gone from your field, Sunlight Strike's effect ends and it's destroyed!
Kaito: Listen to me, Vanessa. It's not only me all our resistance comrades are awaiting for your return
Vanessa: I don't care about that!
Kaito: The original Vanessa will only be happy to see her comrades again
Vanessa: The original Vanessa? That's a nonsense!
Kaito: Battle! I attack Dark Sunshine with Neo Galaxy Eyes Cipher Dragon!
Vanessa: That won't happen! By sending Parasite Fusioner to the graveyard I can negate the destruc--M-My hand!
(Subconscious mind: (holding her arm) I won't allow you!)
Sunshine: (screams as she's destroyed)
Vanessa: (screams) (Lp: 2300 > 1000)
Brother!
Kaito: Oh! Is that you Vanessa?!
Vanessa: Brother, Quick! end this!
Kaito: (nods) By banishing Sun Miracle, my monster can attack again! I give you a direct attack with Neo Galaxy Eyes Cipher Dragon!
Vanessa: (screams and falls unconscious) (LP: 1000 > 0)
Kaito: Vanessa! (Goes to her and holds her) Vanessa, everything is fine now, i'm right here with you
Vanessa: (starts to wake up) Brother.....you accomplish your promise (smiles)
Kaito: Vanessa (hugs her)
Vanessa: (smiles and hugs back)

I hope you like it! See ya next time!
"The being born from the brilliant and graceful diamonds and crystals show us your form and purify all evil! I Synchro summon! Level 9! Diamond Light Magician!"
Crow: There is no mistake, this is the deck of Luna but.....
Next time: Crow vs Luna battle!