Waking up the first thing he heard were shouts of Zenitsu.
Arriving to the room everybody quiets down,
" Aren't you all noisy today. Are you almost done whaling Tanjiro? " Ken asks.
" He should be done healing soon. " Aoi replies. " But may I ask who you are? "
" He is the moon hashira. The reason you haven't seen him is because he's a little shy. " Shinobu appeared and answers.
" By shy she means I'm too egotistical for the team and they'd all end up trying to fight me. But I'm sure you wouldn't do anything~ " Ken says as he appears behind her and put his arms around her neck and rest his body on her.
Everybody in the room got scared for Ken thinking Shinobu would kill him but instead she ignored it and looked at them.
" Since you're healed enough, we should start your training " Shinobu said as Inosuke and Tanjiro were forced to come.
For the next 2 weeks they always came back to their room almost dead from exhaustion.
The next day Zenitsu finally joined,
Once they got in the room Both Shinobu and Ken were there which was a little surprising.
" Wow you all look so dead, maybe what you need is a little motivation? " Ken said to which the 2 hashiras sat on the table with cups.
" We will show you how strong you can get after the training Ms.Shinobu has prepared for you. " Ken said.
" Ready! Start! " Aoi shouted as they both quickly played the game.
Ken was obviously faster but he kept his movements extremely slow to make it seem like a tie.
After a while he sped up a bit and grabbed a cup but instead of dropping it on Shinobu he threw the liquid at the trio.
" Oops, sorry about that. Looks like I missed. " Ken said to which at the corner of his eye he noticed Shinobu about to drain him with the liquid inside the water but he moved out the way.
" Jeez, I missed on purpose but you still wanted to get me dirty. Aren't you naughty~ " Ken said to which Shinobu got up and left.
" Did y'all like the display of strength? " Ken asked to which the boys nodded and continued training harder.
Shinobu was at the hall thinking about something, ' At the last moment he sped up enough to let me see what he was doing as the cup was close to my face, but the very last second he sped up even faster and shot the liquid at the kids. It annoyed me since he showed mercy so I tried spraying him with the liquid but he still managed to get out the way…Just how fast is he? '
….
They all trained hard and learned total concentration constant faster than before, Ken spent most of his time with either Mitsuri or Shinobu as he had fun talking to them. Shinobu still ended up talking with Tanjiro but this time he said " I can smell an angry and happy scent from you except that your anger is stronger. "
As their conversation was close to ending Ken appeared and hugged her from behind.
' Her happiness grew stronger then her anger?? ' Tanjiro thought.
" Are you almost done? I didn't wanna bother you but I wanted to talk for a bit. " Ken said to which Shinobu wrapped up the conversation and left with Ken.
Ken managed to see the scene with Tanjiro and Kanao.
Ken popped up behind Kanao,
" Well look who's in love~ " Ken said making Kanao jump.
" I'm just kidding jeez, but Don't worry I won't take your time. Just know that Tanjiro kid is right and you should start deciding on your own. He tried helping you, if someone told you to kill him. Would it not hurt to kill someone that helped you ? If it doesn't then your a cold blooded monster just the same as demons. Well I'm on my way now! Take care kid. " Ken left as Kanao thought about it.
" I don't want to kill him…" She said to herself as she walked back inside the building.
Ken convinced Kagaya to let him join the mission, which he agreed since they didn't have missions for him.
' Now what should my plan be? Let rengoku live? Or let him die? ' Ken thought of that as he reached the train.
He caught the trio being retarted as he boarded the train and watched them run to reach the train.
" You three are idiots. " Ken said scaring them, mainly Zenitsu as he fell off the train and the other two had to save him.
" WHY DID YOU SCARE ME LIKE THAT? I COULD'VE DIED!!! " Zenitsu shouted
" If you died from a small fall like that then you're too weak to be a demon slayer. " Ken said to which Inosuke laughed hard and Tanjiro tried apologizing for Ken.
* I didn't watch the movie but Ik the details so iam give a small explanation *
Ken doesn't really get involved much since it pretty much is safe but when Akaza pops up ken let's rengoku fight him but before he becomes a donut ken steps in and stops him.
" I don't care about your " sad " backstory in the end you die by me. " Ken said slashing off his head as akaza dies from shock of someone else using the moon breathing.
After this they all go back to the hashiras building, Ken was starting to get get excited because now they should all be alive and well including the strong upper moons.
' I wonder if they'll ever work with demons to stop me ' A evil smile slipped out as he flashed out the building and started his killing spree against humans and demons.
( I was gonna make it longer but I never watched season 2 nor manga and I don't have Crunchyroll for S2 and don't really want people to wait like 1 or 2 weeks to release a chapter so this demon slayer arc will end in 1 or 2 chapters )