Twiggy

 is a gnome rogue. She is played by Deborah Ann Woll.

Gnome Abilities

 * Darkvision
 * Gnome Cunning
 * Subrace: Forest Gnome
 * Natural Illusionist
 * Speak with Small Beasts

Rogue Abilities

 * Cunning Action
 * Evasion
 * Expertise (Investigation, Thieves' Tools)
 * Roguish Archetype: Arcane Trickster
 * Mage Hand Legerdemain
 * Spellcasting
 * Sneak Attack (4d6)
 * Thieves' Cant
 * Uncanny Dodge

Wizard Spells
As a 7th-level Arcane Trickster, Twiggy knows three wizard cantrips and five 1st- and 2nd-level wizard spells. She can replace the spells she knows when she gains a level.

Cantrips

 * Mage Hand

1st-level

 * Disguise Self
 * Tasha's Hideous Laughter

2nd-level

 * Invisibility
 * Mirror Image
 * Suggestion

Notable Items

 * Component pouch
 * Fun Ball of Tricks (given to Caleb Widogast)
 * Shortbow

Trivia

 * Twiggy is the fifth of five guest characters to get a "How do you want to do this?" on stream (the four others being Zahra Hydris, Kerrek, Shakäste, and Tova)