The sissidre (/ˈsɪsɪdɹeː/) is a crimson, worm-like stranger of three classifications. Type-1 sissidre bear blue eyes, type-2 bear white, and type-3 present with yellow eyes; otherwise, these varieties differ in no notable way.
The sissidre's outer surface is smooth and clean to the touch, although physical contact will appear to "smudge" its markings, much like holding a piece of chocolate or similar candy in the palm of one's hand for too long. The sissidre returns to normal once let go once more. With force, it can be bent or broken open to reveal a thin, liquid core, similar in proportion to the graphite inside a wooden pencil. The liquid inside is odorless, and only slightly oily.
Though becoming gummy when touched, the sissidre is durable. While not regenerating readily from injuries, it is able to sustain significant damage before its constitution reaches a breaking point and its body crumbles.
Regardless of type, the sissidre is mute.
The sissidre initially generates as a tiny black "seed" of approximately 1/16 of an inch in diameter on any surface that is roughly level. This seed, which is smooth and black, remains unstirred by movement of the earth, air, water, or sensitive touch.
After three days, the seed is instantly replaced by a fully-formed sissidre. The sissidre's type loosely reflects emotional conditions in its vicinity. Places that host more joyous events (such as family get-togethers or festivals) tend to generate type-1 sissidre, while sites of tension or destruction spawn type-2 sissidre. These tendencies reflect only general patterns, however, and cannot be thought of as a hard rule, as even slaughterhouses may produce the occasional type-1 sissidre. Type-3 sissidre, however, seem uninfluenced by these trends.
The sissidre possesses a covertly bemused demeanor, regardless of type. Favoring night time and rooftops, a lone sissidre basks and cavorts without tire until sunrise, its twirling body suspended without weight, its tail coiling in tight rotations. During daylight hours, it becomes almost transparent, and settles upon whatever surface is beneath it. During this state, it becomes either rigidly immovable or fragile, depending on the instance.
Though rare (with only a handful of occurrences within a region), the sissidre is extremely sociable, and upon seeing another of their strain, flutters over with excitement. Two sissidre circulate each other, forming cinctures and ringlets, but otherwise remaining physically separate. Should a third sissidre join them, however, the group forms a tight entwinement that does not separate unless by outside force, and drifts (albeit slowly) as a whole.
Once entwined, the sissidre's cores drain day-by-day, emptying out within the quarter-year. "Empty" sissidre untangle themselves from the group and return to their wandering, becoming active in the daytime, however, rather than by night.
The sissidre appears to detest being handled by a sensitive, writhing upon contact and slapping at the offending individual with their coils until left alone once more. Nearby sissidre become restless when a companion is touched, but flee only if directly antagonized, themselves.
The sissidre has no effect upon a sensitive until in a trio, at which point they cause a random sensitive within 1,002 feet to begin hearing strings of numbers, letters, or phrases, with this sensation sometimes accompanied by mild euphoria.
In addition, the most recent sensitive who has encountered the twine of sissidre is granted extraordinary gifts of language, patience, and understanding. As long as the triad is alive and unharassed, these endowments persist.
At the end of the sissidre's life, both lone individuals, as well as those within a group, seek out an enclosed space in which to curl up and die. Though gravitating towards immediate isolation, the sissidre nonetheless remains gregarious in its death, and finds a place as close as possible to any companions before dying with a silent settlement. The sissidre's markings fade following death, while its corpse (which becomes dry, and not waxy) last up to a year before crumbling.
Living sissidre display curiosity towards another sissidre's carcass; physical contact, however, causes these remains to collapse. Should the corpse still contain fluid, and should the living individual display any depletion, the contents drain from the latter and fill the former through osmosis, before the now-refilled individual returns once more to its gamboling drift.