Chase After the Ghost Sentinel is a side quest inside the In Depths of the Night main quest in Infinity Nikki Version 1.3.

But before you get this objective, you need to take a photo of a strange violin at the square.

The photograph you capture at the square will provide a clue to collecting Black Blings, leading you further in the main quest.

Capture The Violin To Unlock Ghost Sentinel Quest

To capture the violin statue, head to the square. At its center, you will find the statue with a violin. You should stand before the statue, making the violin visible in the background.

Now, capture the picture using Momo’s camera and make sure the violin is visible in the background. Once you have captured the perfect shot, you can unlock the Chasing After Ghost Sentinel objective.

In this challenge, you must follow a translucent figure, i.e., a ghost, that darts through the Abandoned District.

Chasing After Ghost Sentinel In Infinity Nikki

As said, in this objective, you need to chase the ghost by following the glowing trail it leaves behind. The ghost itself is faint but visible against the darker surroundings.

Simply follow the ghost as it hovers away until it reaches the platform. You can also use the bike to travel faster.

Meanwhile, you can Investigate Lampblooms on the way. After you reach the top, you walk across the hallway to the wall opening, where you will meet the ghost. Now, get off the bike to complete the objective.

As you are done chasing the Ghost, you will find yourself in the Queen’s Palace Ruins front yard, where you will meet Scarecrow.

You can interact with the Scarecrow, obtain clues, and collect Black Blings, an essential item to progress in the storyline.