Ayalla's spirit guardians is still up but won't do any damage to anyone in range until the start of the enemy's turns.
The white border, not that you can really know this, is the edge of the fog cloud, so anything left of the white edge is opaque - can't see anything for spellcasting purposes, adv/disadv negated, no OAs. That's why all the creatures are ?s as well.
The only way into the room is the door that Polina is adjacent too, so narrow chokepoint.
Ayalla, Leif, and Trellara are up.
Initiative:-
Ayalla: (1d20)[19]
Leif: (1d20)[18]
Trellara:(1d20)[16]
C: (1d20)[15]
Paul: (1d20+1)[9]
M: (1d20)[6]
Polina:
(1d20)[2] 4 (adv from discord)
U: (1d20)[1]
Spoiler: Updated Trellara Statblock
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Medium Humanoid (elf), Chaotic Good
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Armor Class 16 (studded leather armor)
HP 38 (5d8+5)
Speed 35 ft
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Str 8 (-1), Dex 16 (+3), Con 13 (+1)
Int 12 (+1), Wis 13 (+1), Cha 16 (+3)
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Saving Throws Str -1, Dex +5, Con +1, Int +1, Wis +1, Cha +5
Skills Acrobatics +6, Survival +6, Nature +4, Perception +4, Performance +8, Stealth +6
Tools Lute +6, Lyre +6, Viol +6
Senses darkvision 60 ft, passive Perception 14
Languages Elvish, Common, Sylvan
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Fey Ancestry. Trellara has advantage on saving throws against being charmed, and magic can’t put her to sleep.
Mask of the Wild. Trellara can attempt to hide even when she is only lightly obscured by natural phenomena.
Song of Rest. (1d6)
Bardic Inspiration. D8, 3/SR.
Jack of All Trades.
Fighting Style - Dueling
Blade Flourishes (See Swords Bard)
Spellcasting. Trellara is a 5th-level spellcaster. Her spellcasting ability is Charisma (spell save DC 14, +6 to hit with spell attacks). Trellara knows the following bard spells:
Cantrips (at will): dancing lights, mage hand, prestidigitation
1st level (4 slots): cure wounds, detect magic, sleep
2nd level (3 slots): enhance ability, lesser restoration, shatter
3rd level (1 slots): mass healing word, Sending
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Actions
Scimitar (melee 5 ft) +6: 1d6+5 slashing
Longbow (ranged 150/600 ft) +6: 1d8+3 piercing
Dagger of Trollslaying (melee 5ft) +7: 1d4+6 slashing + 1d4 fire or acid.
One of Trellara's 3rd level slots is "permanently" occupied by Sending to Sellyria each day. If you want her to relay any messages or ask any questions of Sellyria, she can do so.