"It looks like Erza's ancestors are from our dimension. I believe that she was sent to us in purpose of the people who requested the mission to retrieve that scroll. As we discussed it she mentioned how they looked like and those we're part of a criminal group of powerful ninja's who gone rouge from their villages. I have the reason to believe that they are after her kekkei genkai because she is part of the Uchiha clan. So I came here to find clues about her past to know who she really is by learning her past and so I can protect her" He explained. "So if I may ask team natsu to accompany me back to the ancient ruins where she disappeared to find clues and to investigate further. I request Erza's team because she highly respect their skills" he added. The old man nodded in response "So you are telling me that those guys only used us to get to her. Please do what you must and protect my dear Erza for me" he said.
"Kakashi fight me" Natsu yelled "If you are assigned to protect Erza it means that you're strong, so I challenge you on a fight!!" He added "I am the strongest dragon slayer wizard in all Fiore, let's see what you can do. I've always wanted to be a ninja like what I've heard from the stories" he explained. He sure is like Naruto as Erza described him he thought. "We'll make this formal, as I myself is curious to what skills a ninja has compared to us mages, there are no rules with this match you win by beating the hell out of you opponent until he can't move anymore or if he surrenders and refuse to continue with the fight, so do you accept the challenge mister?" Makarov asked "Yes" kakashi answered as if he had a choice. "Alright let's do it on the duel grounds and place your bets here" Makarov handed 2 buckets half of the guild members bet on the mage and the other half on the ninja. "This is an official match between Natsu Dragneel, the fire dragon slayer and Kakashi Hatake a ninja- S-rank jounin of konohagakure: Ready, get set and Go!!!" Makarov signaled the fight.
"Guren Karyūken" Natsu rapidly punches the ninja, with his hands lit ablaze but the ninja kept dodging his attacks, "You're fast" Natsu exclaimed and punchedthe ground creating a fiery explosion after contact. "Katon: Gōkakyū no Jutsu" the ninja commanded a burst of fire expels from his mouth, forming a giant fire ball it is powerful enough to crater the ground and vaporise the surroundings. He was shocked to see that Natsu did not only stood there but he ate the fire. "Thanks for the meal that was a good one" natsu boasted "Back at you, here's you fire Guren Bakuenjin" as he swipes his arms in a circular fashion, creating a powerful, and highly destructive, torrent of flames that barrages his target. Much to his surprise that the ninja are nowhere to be found he suddenly felt a foot pressed towards his back sending him flying away. "You're good but I'll finish this off Shiranuigata Guren Hōōken" natsu ignites his entire body with fire, and then charges towards the ninja, sending him into the air with a sharp uppercut. "I won" natsu announced and all of a sudden "Sennen Goroshi" Kakashi tightly clasps his hands together and extends his middle and index fingers, resembling the Tiger hand seal. Using the full weight of his body, he thrusts these four fingers between the mage's buttocks. Natsu comically leaps into the air, travelling a fair distance. Natsu hits the ground groaning in pain which is fairly extreme. "I guess I won" kakashi said towards the guild master.
Team Natsu was summoned by the old man. "I can't believe you tried a dirty trick on me" natsu charges towards Kakashi "I do not use my real powers against my comrades" he answered with a smile "Comrades- you sounded like Erza. Is she safe now you're not with her?" Gray commented. "Oh yes she is very safe. I left her in the care of our legendary female sannin, her being a legend I am confident that she can protect her" kakashi explained "This situation makes me a liitle worried for Erza sama she's the one who invited me to join fairy tail and she was like a big sister to me, she always protects us and this time I want to protect her" Wendy said with a low and worried tone
"Don't worry, Erza is a strong and capable woman, she'll be alright and besides we are here for her" kakashi smiled. I don't know if I should be worried about this ninja being around Erza or should I be jealous. I always wanted to be more than friends with her but I can't seem to find the chance. But this guy talks about her and when he does his eyes are literally making love with her by just saying or hearing her name. What's with this guy- Gray thinks to himself as he stares questionably at the ninja kakashi stares back at him in the corner of his eyes thinking This gray guy sure has a thing on Erza- just a best friend- I don't think so, maybe I should move to win her heart before this guy does but suddenly realizes what he was thinking and blushed and told himself to stay focused on his task.
"So why call us here gramps?" Natsu asked "I need you to accompany kakashi back to where Erza disappeared. I need you to help him investigate to protect her. She might be in grave danger. We need to be thankful for this ninja who is doing his best to get to the bottom of this and save her from anything that might hurt her. You need to follow his lead and be of assistance whenever necessary- that is your mission" He instructed "Thank you for all your help, we will leave tomorrow morning" Kakashi concluded