Crinkle, Tressym Familiar

Detect Invisibility. Within 60 feet of the tressym, magical invisibility fails to conceal anything from the tressym’s sight.

Keen Smell. The tressym has advantage on Wisdom (Perception) checks that rely on smell.

Poison Sense. A tressym can detect whether a substance is poisonous by taste, touch, or smell.

Bard Sidekick. Crinkle is a level 7 bard sidekick. She gains the following.

Proficiency Bonus. Proficiency bonus is +3.
Hit Points. Gains 19 (7d4 +0) hit points.
Bonus Proficiencies. Wisdom saving throws, Arcana, Insight and Persuasion skills.
Ability Score Improvement. (+2 Charisma)
Spellcasting. Crinkle is a 7th-level spellcaster. Her spellcasting ability is Charisma (spell save DC 13, +5 to hit with spell attacks). She has the following bard spells prepared:
Cantrips (at will): mage hand, mending, minor illusion, vicious mockery
1st level (4 slots): cure wounds, disguise self, faerie fire
2nd level (3 slots): invisibility, blindness/deafness 
3rd level (3 slots): nondetection, catnap
4th level (1 slot): charm monster 

Magical Recovery. Beginning at 2nd level, when the sidekick finishes a short rest, it can recover expended spell slots. The spell slots can have a combined level that is equal to or less than half its level in this class (rounded up), and none of the spell slots can be 6th level or higher. Once the sidekick uses this feature, it can’t use the feature again until it finishes a long rest.
Potent Cantrips. Starting at 6th level, the sidekick can add its spellcasting ability modifier to the damage it deals with any cantrip.

Equipment: Familiar's Bell Collar. This magic item has the appearance of a fine leather collar with a little golden bell attached it. The collar may be worn by any creature summoned by find familiar. The collar resizes itself to fit the familiar, and the bell only jingles if the familiar wishes it to. Once worn, this item grants the following abilities: 

• The familiar gains the ability to understand and speak one language that the master can speak.
• The familiar is aware if its master becomes targeted by a divination spell, even if its master would not normally be aware of it.
• The familiar can help it's master with the casting of a ritual spell by assisting with the runes, components and focusing of magic. If the familiar actively assists for the cast duration, it reduces the cast time of the ritual by half.

Additionally, this item counts as both an orb arcane focus and a musical instrument if the familiar is capable of spellcasting.

Claws. Melee Weapon Attack: +0 to hit, reach 5 ft., one target. Hit: 1 slashing damage.