Shunin (a Touhou LW original) refers to often-cloudy spring skies. This is an apt temperament for this Patchouli, who has embarked on a long journey to end the Lost Word Incident. Patchouli's temperament has been fully reconstructed. As ever, she's weak to Star Essence, but thanks to her powerful elemental magic, she's strong against all other Essences and Phases.

The ability of Patchouli Knowledge, who has almost reached the end (a Touhou LW original). Patchouli completely lost this ability due to a Lost Word. She is currently regaining it little by little, though not through restoring or replicating her old ability, but with a newly constructed original ability that formed a core to build upon. She has continued to travel across worlds to try and end the Lost Word Incident. As a master of knowledge, nothing could've hurt Patchouli more than losing her knowledge. To her, it was a fate worse than death. It was also both insulting and humiliating. Even still, the unmoving library refused to move, but given the circumstances, it's not like moving would've helped anyway. The bigger issue was whether it was possible to use the essence of knowledge to combat the Lost Word Incident... As a witch and an active magic researcher, Patchouli simply wouldn't allow the answer to that question to be no. Remilia and the other Scarlet Devil Mansion residents; a book thief sneaking into the library; her own past, which she seldom reflected on; and Gensokyo itself, where she spent time with her closest friends... To Patchouli, her memories were far from worthless―though, she wouldn't go so far as to call them important. That said, the majority of her memories were easier to say goodbye to than it was to lose her steadfast desire to attain more knowledge and perfect her spirit magic. Even after facing the Lost Word Incident and being in total free fall toward the singularity of nothingness, her thirst for knowledge remained. In a way, this thirst was a curse. Even when other ways to advance were conceivable, she was only capable of seeing those that relied on knowledge. Although, perhaps "advance" isn't the right word to use for someone so opposed to moving... Patchouli's never moved, and so to her, losing the ability to move wasn't a problem. She didn't mind being made a spectator as reading a book is much like being a spectator to its contents, unable to change what's written. However, she didn't know how to share the knowledge she'd amassed with the world. Ultimately, she decided to venture out... if only by a step or two. The Grimoire of Patchouli It's been confirmed via sufficiently reliable documents that the true form of Patchouli's grimoire is, in fact, the Great Library, in which she resides, and not a physical book. The Grimoire of Patchouli seems to take on the appearance of an input-output device, similar to a typewriter, although this only represents one aspect of its greater whole. The grimoire's true nature can be understood as the mechanism through which Patchouli can perfectly transcribe the knowledge in her head into magic books whenever she pleases. In other words, the grimoire is the embodiment of her existence as a witch. For convenience, the grimoire is often referred to as her brain, but it doesn't seem like most youkai rely on their brains to think. In fact, the idea that the brain controls our thought process is a recent and materialistic notion proposed by humans. Patchouli's thought patterns and knowledge bank have been sublimated into what ought to be referred to as a "mini Makai," formed by the infinite Koakumas that she summons. The Koakumas form a boundary-like Otherworld that exists both within Patchouli's mind and separate from her. It may even be appropriate to call it a type of parallel world. Patchouli's ultimate goal, her metaphorical philosopher's stone, is to attain all knowledge. To achieve this, she must complete the inherently paradoxical and impossible task of embedding a perfect replica of the world within that very world. Patchouli, who can wield spirit magic (i.e., magic that directly influences temperament, the building block of the universe) and is skilled at making mini dioramas of other worlds, created a mini Makai based on the principle that a given infinity can perfectly enclose any other infinity of equal scale. This feat surpasses the space-expanding abilities of Sakuya Izayoi and the hermits and is more akin to the ability of Kaguya Houraisan. It seems that the true form of the philosopher's stone may be the Hourai Elixir after all...