Flowey had sat there in the sunlight for long while after his encounter with the human.
"Such a stupid girl", he thought.
"She actually believed me!"
"Friendliness pellets!" With this Flowey chuckled to himself. If it hadn't been for Toriel saving her hide he would have that soul at this very moment.
"Oh, well she's bound to get killed anyways, she doesn't look like she would have the stomach to swat a fly let alone take on the king of monsters". He would just have to wait for the opportune moment to take her and Asgore's soul, along with the souls of the other six children who fell down here. He began to relish in how well thought out his plans where when he was interrupted by a faint, metallic chinking beyond the light of his flower bed and into the darkness beyond.
"What the…?"
Out of the darkness Flowey saw a moving shape. The metallic noise grew stronger as the shadow drew closer to the flower bed. At the edge of the yellow flower bed, where the light clashed against the darkness, a figured appeared. He thought to himself, 'another human, ohhh this keeps getting better and better!' He began his usual introduction.
"Howdy!"
"*I'm FLOWEY!"
"*FLOWEY the FLOWER!"
The figure continued to stare at him at the edge of the flower bed, half of his figure concealed in the dark. Flowey could see that the figure was well armed and armored. His armor looked worn and battle tested, the armor itself was covered in scratches and indentations alike. The figure continued to stare at the flower with a glare that seemed to penetrate right through the flowers very soul. Whoever was behind that iron helm did not seem to be amused or entertained by Flowey's introduction. Flowey began to feel dread crawling up his vine as this armored figure continued to stare at him. He let out a nervous laugh as the figure continued to stare from the edge of the light.
"ha… haha…"
"*So, uh, you're new to the underground, aren'tcha?"
The figure began to step forward, becoming completely encapsulated by the light, and began to step forward toward the flower. Flowey was becoming more and more frightened by the figure's sudden approach. It slowly walked toward the flower, its metallic clanking signaling its increasing proximity to Flowey. The figure stopped mere inches from the flower and proceeded to kneel, its blue eyes through the thin slits of the helmet showed both distrust and malice. It continued to stare down at the flower. Flowey looked up to meet its gaze and gulped, fear was taking hold of Flowey and he began to nervously shake.
"G-golly, y-you must be so confused", the flower managed to squeak out.
"So, someone ought to teach y-you how things work around here, r-right?"
"I-I guess little old me will have to do, huh?"
The figure continued to stare, its eyes still fixated on the talking flower and seemingly right through it. Flowey reluctantly began the battle.
"R-ready?"
'ohhh god!'
"H-here we go!"
Flowey stared in astonishment, 'LV 100?!' what the hell was this guy? He obviously wasn't from around here. Where did he get the souls to get that much LV? 'Was this guy some kind of mass murderer? Flowey continued to become more uncomfortable with the continuing situation. Flowey managed to find his voice under this new-found fear and curiosity, "Where did you get all of that LV?" The figure just continued to stare at the flower as it had throughout the encounter. The flower continued to speak, hoping to get out of this encounter, there was no way he could take on whatever was inside that hulking mass in his current form. 'Maybe I can get this guy on my side?' The flower thought. With this he looked back up into the slits of the helmed figure and noticed a look of both malice and distrust in whatever the flower had to say next. 'You know what, maybe it would be better to just let this guy be, besides he's probably going to go on a rampage down here anyway, no use in keeping him from it. It seems as though this guy's already after taking souls, I just need to be around when he gets to that other kid and stabs them to death with that sword of his.'
"You know what?"
"I think you already know how this works…"
"But before you go, you should know something…"
"Down here it's killed or be killed…"
"So, watch yourself out there…"
"You might be asking yourself, why would little old me be helping scary old you?"
"Well, let's just say you seem like a good guy and I would hate to see you get killed by the other monsters down here."
"Oh, and by the way…"
"There's another human stalking the underground."
"She's been consuming the souls of my friends, just for the sake of killing them!" With this Flowey gave the best mortified and tearful expression he could give.
"If you do come across her while you're down here…"
"Please end her killing spree, I'll even show you a way out of here if you do!"
Flowey searched for a response from the lumbering mass of metal that was kneeled before him, but as usual the figure continued to stare down the flower. 'Please don't kill me, please don't kill me, please don't kill me…", rushed through Flowey's mind. A few minutes after Flowey finished his speech the metallic figure slowly stood up, walked around the flower and into the darkness on the opposite side of the yellow flower bed, the metallic clinking fading into the distance. As the figure disappeared into the darkness the flower was left with a higher than normal excitement. 'Phew! I'm glad that's over. Maybe this guy is just stupid enough to believe me. Not very talkative at least, at least the other human told me her name. With that the flower was left with its thoughts. But there was something else in the dark where that armored guy stepped out of… something… off. Was there someone else that Flowey couldn't see? Something… darker… something that seemed just as powerful and maybe even more frightening than the last guy. 'No', Flowey thought, "It's just my imagination playing tricks on me, that last guy just rustled me up a little bit." But, Flowey could sense that there was something watching him in the darkness across the flower bed. In mere moments the feeling left him, left him with more fear than before.