You can even see for a short while that this vessel tries to drag itself and approach its sibling Knight just before dying, seemingly pleading for help.

Even before that, as the Broken Vessel is defeated, the infection explodes out of it, giving the Broken Vessel a brief moment to die as an ordinary bug.

This scene itself is a reminder that both of the bugs are siblings in the first place, or that they share a common bond, even if the Broken Vessel / Lost Kin had to be killed by the Knight in order to obtain the Monarch Wings. Also, the prompt that appears is 'Accept' instead of the usual 'Listen'.

After you defeat the Lost Kin, it bows down to the player Knight.

Dream Nailing her before killing her reveals that she's still singing her song in her head. Eventually, she'll completely succumb and become hostile, forcing you to kill her, which lets you listen to the lovely sound of her screaming in agony as she dies. First, you can no longer hear her sing as you walk in, as she's just standing there, swaying back and forth while mumbling her song's lyrics to herself. However, over the course of the game, Myla slowly succumbs to the Infection.

When you first enter the Crystal Cavern, you meet Myla, a sweet miner bug with a stutter who loves to sing while she digs.

What starts off as a heartwarming and casual narration suddenly turns grim as the Hunter subtly tells you that he is now the Last of His Kind.

The Hunter recalls his younger days as he talks about Funglings.

Its description in the Hall of Gods also calls the Brooding Mawlek as the 'Lonely god of the nest'.

The Brooding Mawlek that you encounter in the Forgotten Crossroads is all alone by itself. The reason why it is so aggressive? It wasn't able to mingle with its own kind.

The Brooding Mawlek's Journal entry suggests that this creature is an extremely social one in other words, an extrovert.

Over time, the town starts to fill up with other bugs, but depending on what the Knight does, several will leave again (or die), such as Bretta if the player defeats Zote's dream form enough times, having grown disillusioned with Zote and having had her perception of the Knight shattered. The town is described as fading, and only one being resides there, the Elderbug. For a game overflowing with Nightmare Fuel, there are more than a few moments that tug on the heartstrings.

Hollow knight complete journal