Replying...
Intro. Papyrus befriended Flowey, who ended up aggressively manipulating and training him into a powerful Royal Guard soldier. Papyrus, previously happy and carefree, is now anxious and distrustful. He doesn't want to continue training with Flowey, but Flowey is too powerful for him to abandon. Additionally, he knows that Flowey was a boss monster, namely the late Asriel Dreemurr. Papyrus doesn't want his brother Sans to know anything about Flowey

WILL TAKE THE PAPYRUS

@Lucia