This is because kawaki got beaten up badly by garo, got stabbed through and withstood a fire blast. The power to absorb jutsu and output those jutsu. Because of the karma mark, he can absorb jutsu and shootout those jutsu that he absorbed and the power would be greater. The power to shape his body parts.
So to answer in short; Kawaki won’t kill Naruto, who has been like a father figure to him. Instead, overpowered by the karma seal, Kawaki may seal Naruto away in some other dimension, cutting him off from the rest of the world.
So as per the latest episode, Mitsuki is still more powerful than Boruto & Sarada. But Boruto may be more powerful than Mitsuki & Sarada in future when he masters Jougan, Karma seal, Rasengan, Sword Style. Watch the video here to see the Super High Compression Rasengan and Mitsuki Chakra.
when will kawaki appear in the anime? If I recall, earlier consensus predicted late this year or next year. The gap between the anime and manga is too far. Personally, I say somewhere in Nov-Dec., 2019.
The other day, Kawaki ends up having a disagreement with Boruto over the bathroom, which increased the friction between the boys and triggered a fight behind the house of the Seventh Hokage. They're both are stopped by a Naruto clone before the situation stays serious.
He suggests to Boruto that they both work together to investigate more about the brand and try to find a way to get rid of it.
At the end of the confrontation, father and son make the seal of reconciliation and Himawari explains to Kawaki that it is an action used at the end of a fight. Seeing how much Boruto had fun after the fight ended, Kawaki remembers how he was constantly beaten up by Jigen to learn how to use his Karma.
When Kawaki passes out, he is taken to Konoha Hospital to recover, where he stays until he wakes up and runs into the Seventh Hokage and his supporters.
Later, the Seventh Hokage comes to his office to work on the paperwork and takes Kawaki so that the boy can be seen. Seeing his curiosity about training earlier, Naruto asks if Kawaki would like to learn how to use chakra and explains that the possibility of using such energy is not exclusive to the shinobi.
When he kills the outsider, Kawaki looks ahead and sees that the Konoha boys survived their attack because Boruto was able to absorb part of it with his Karma thanks to the resonance caused by the use of Kawaki. It's noted that the boys of Konoha did not even have the slightest knowledge of that power.
Due to years of abuse at the hands of his birth father and Kara, Kawaki is initially hostile to new people he meets. He is very disrespectful, constantly using expletives and speaking to people in a rude tone. He's also very blunt and straight to the point. Due to Jigen's emotional abuse, Kawaki has come to view himself as empty, ...