"Window BGM and Jukebox" option has been added to the Game Update section in the poll. You can update your responses if you want to change your votes.
SinclairDawn Office Fixer
Gains increased SP from standard sources (clash win, killing an enemy, etc) letting him reach max SP faster.
At 40+ SP, he consumes 20 SP to go into his Volatile E.G.O state, upgrading his skills and giving him bonus 
Burn application and Final Power against enemies with Burn. He loses an increasing amount of SP every turn in this state and if he hits 0 or below SP, he loses the Volatile E.G.O state. He can only trigger this once, so once he loses it, he can't activate it again by bringing his SP back up.
Gains 
High Noon and 
From Dawnbreak to Sunset from having [Faust] Dawn Office Fixer and [Gregor] Dawn Office Rep fielded respectively. These upgrade to 
Loneliness at High Noon and 
Blazing Sunset if they die. Both massively buff Sinclair's speed, power, damage, and survivability.
When in Volatile E.G.O state, his S1 gets a Coin Reuse, his S2 gets bonus atk weight at the cost of some SP, and his S3 is converted into a high rolling single coin skill.
If his passive is active while in Volatile E.G.O state, he also gains additional Coin Power on all his skills depending on how high his SP is (+1 at 20 SP, +2 at 40 SP, +3 at 45 SP).
His S3 in Volatile E.G.O state gets increased damage and Burn application with 
Reson., but consumes some SP on use. Both versions of S3 give him SP on clash win and makes him lose SP on clash lose.
Having 2 allies die in the same turn will forcibly trigger his Volatile E.G.O state and can be triggered multiple times in the same encounter.
His passive increases his Burn application regardless of whichever state he's in.
3 +7
62 (+2)Clash: 3-17Damage: 6-67.43Atk Weight:
Burn
5 +362 (+2)Clash: 6-28Damage: 15-76.39Atk Weight:Burn, Clash Power +1
[On Use] When in a Volatile E.G.O state, consume 5 SP
[Before Attack] When in a Volatile E.G.O state, Atk Weight +1
- At 45 SP, Atk Weight +2 instead
[Attack End] When in a Volatile E.G.O state, consume 5 SPBurn CountBurn CountBurn Count
4 +763 (+3)Clash: 5-33Damage: 8-67.81Atk Weight:Burn on target (max 2)
When in a Volatile E.G.O state, activate Blazing Strike instead
[Clash Win] Heal 10 SP
[Clash Lose] Lose 10 SPBurnBurn
13 +1565 (+5)Clash: 14-44Damage: 44.2-272.03Atk Weight:Burn Potency on all enemies) (max 8)
[Clash Win] Heal 10 SP
[Clash Lose] Lose 30 SP
Deal +10% damage for every Wrath Reson. (max 60%)
If at 4+ highest Wrath A-Reson., deal +20% damage for every Wrath Reson. instead (max 120%)
[Attack End] Lose 15 SPBurn on target (max 120%)Burn, inflict 2 Burn against (# of highest Reson.) random enemies
- If the above Reson. was a Wrath Reson., inflict +1 Burn Count as wellBurnBurn Potency of the defeated target between all enemies (max 10. In Focused Encounters, between all Parts)
15 +565 (+5)Clash: 35-46Damage: 0-0Atk Weight:Burn on target (max 20)
Volatile Passion while in the Volatile E.G.O state.
Turn Start: At 0 or less SP, exit the Volatile E.G.O::Waxen Pinion state. x5Burn Potency and Count with its Skills (Activates 6 times per turn)
When in a Volatile E.G.O state, and at 0+ SP, gain Coin Power +(SP/20). At 45 SP, gain Coin Power +3 instead. x3Burn Count (4 times per turn)