Kotsubo took a fair bit of time to relax down back at home after such a long trip, re-energising himself and going back into the daily duties of his life back in Kirigakure. A bit of news from his father had struck him with a bit of surprise however, as he heard that the old man Mizukage had gone missing and was replaced by the twins. Kotsubo had heard a few gossips about them here and there, but he didn't think they were really something if they had managed to take over the Mizukage position. After Kotsubo was energised well enough, it seems the word was spread well enough that Kotsubo and Yomi were back home, and that meant the Mizukage would've no doubt heard the same.
He didn't waste time as soon as he came to that conclusion, he didn't know if Yomi wanted to even be apart of the meeting or not but just in-case, Kotsubo summoned a shadow clone that would be sent in order to try and find Yomi, and if she indeed was found, would inform her that the real Kotsubo is on his way to the office to report about their mission in the Land of Lightning.
Regardless of Yomi coming along or not, Kotsubo wouldn't wait or waste time to go up to the office, as he's sure that the Mizukage will want to know about how the mission went as soon as possible. He found the Mizukage's office well enough, and after entering was immediately greeted by a "Mission report." which gave Kotsubo a light chuckle. "Straight to the point eh?" he could respect that well enough.
He stood tall, with hands behind his back in a soldier-like manner before finally reporting to the new Mizukage. "It's the typical combo of the bad news and the good news, I'll give you the bad news first to process the reality of our failure first." he wouldn't sugarcoat it, the mission was technically speaking, a failure. "I'll start at the beginning, we managed to touch upon the shores of the Land of Lightning just to be greeted by masked ninja which I assuming were of Kumogakure, I'm guessing they were the Anbu of their village considering their skill. I underestimated them and had gotten captured, and they ran away from Yomi and Nozomi." that was a bit embarrassing at this part, but he got the feeling if he tried to lie about that part, it would just be bad if he got found out about it later on.
"However, I got passed along to a interrogation unit and they failed in whatever they tried to do, which ended up in me going in... a berserk mode of sorts, falling into my Hoshigaki blood and slaughtering their entire unit." he still wondered about that, about what the interrogation unit did that managed to throw Kotsubo straight into his bloodrage mode. "Afterwards, that's when I came across a burning village, containing a few Konohagakure Shinobi and the person of interest, supposedly connected to the anomalies that happened a while ago. A pale woman with burn marks across her face that contained incredible jutsu and strength, against the might of Kirigakure's finest and Konohagakure's own shinobi, she stood her own." he waited for that last part to kick in, to elaborate on the Kirigakure's finest part. "Out of everyone, Yomi was the only one there to inflict injury upon the pale woman, where as everyone else failed to even get that close to her. It forced the pale woman into some transformation... or mode of sorts, after which her overall proficiency was obviously increased and she started to utilise snake jutsu, along with some invisible force that was hiding around her, and attacked anyone that even got close to her. I sent three shadow clones to attack behind her and all of them were dispersed in the same second as a result of it." he would wait a couple of seconds for her to process everything that he's said so far, to get the idea that the foe they've faced was in an entire league of her own.
"Around this time, the Kumogakure Shinobi had finally shown up, though they only watched from a distance, doing nothing while Kirigakure and Konohagakure were taking on this monstrous woman, during which... Nozomi had finally entered the battle, only for the pale woman to run towards her and instead of attacking her, made a pretty speech to butter her into joining her, to which Nozomi agreed upon. I would've attempted to wipe Nozomi out if given the chance, but she was standing right next to the woman, it was impossible so to speak. Afterwards, the pale woman created a barrier of sorts to where the Kumogakure ninja were, locking them inside and made Nozomi go in there to fight them, meanwhile outside, we were still dealing with the pale woman until her... dragon beast had come along." he had a slight pause there because of how ridiculous it might've sounded, but his calm composure would be enough to tell he isn't joking. "She told us to run away, tell about her to our villages. At this point, Yomi had been injected with a paralysing poison by the said woman and I decided it'd be best to retreat, since any further battling would just result in our obvious deaths. So I carried Yomi and went back to our transport that took us to the Land of Lightning in the first place and went back to the Land of Water." and that was it, the entirety of the mission. "Sorry if I over explained, but I felt like you needed the whole story in order to understand it." and he had hoped she hadn't forgotten about the "good news" that he hasn't talked about yet.