Serini is definitely Good because...

[Snails]

...her underground lair is a pleasant place with many well cared for houseplants. A whole bunch of them. Hanging plants. Some nice shrubs. A few planters with rows of flowers. And some substantial dwarf trees. A good variety of specimens.

Albeit this is the kind of pleasant place with chains on the wall for prisoners.

[Metastachydium]

I wholeheartedly agree. People who take good care of their plants are Good people indeed.

[fuschiawarrior]

And there isn't a carnivorous plant in sight which are associated with evilness for some reason.

[erikun]

Ah yes, of course. I'm glad there isn't a well-known class highly associated with plants and also restricted to another alignment (say, Neutral perhaps) which could offer another explanation.
It would certainly throw a wrench into this theory if that was the case.

I'd also note that someone could be evil and still have a desire to aid the good characters depending on their personal interests. Almost fits a theme for the comic.

[hamishspence]

Ah yes, of course. I'm glad there isn't a well-known class highly associated with plants and also restricted to another alignment (say, Neutral perhaps) which could offer another explanation.

Druids have 5 alignments open to then, TN, NE, NG, CN, LN.

[Metastachydium]

You people don't seem to understand. The rules are wrong. People who like planties are Good, and people who don't are not.

[erikun]

You people don't seem to understand. The rules are wrong. People who like planties are Good, and people who don't are not.

All dwarves are non-good, you heard it here first.

[Fyraltari]

You people don't seem to understand. The rules are wrong. People who like planties are Good, and people who don't are not.

What about the people who only like some plants?

[Metastachydium]

All dwarves are non-good, you heard it here first.

Eugene was right! Death to all dwarves!

What about the people who only like some plants?

An excellent question! You know those folks who are Neutral but Good-leaning (or Good but Neutral-leaning)? That's them. Unless of course they hate the other plants. In that case they are not Good at all, but still show signs of being perhaps redeemable.

[Dion]

Trolls are a type of ent, and ents are a type of tree. And trees are all good. Therefore she’s half tree, and only half good.

[brian 333]

There are Evil plant-lovers.
They cultivate plants like kale and quinoa and then eat them. And then these vegetarians go around trying to make other people participate in their horrible rituals by using body-shaming and false claims such as environmental sustainability and health benefits.

Don't fall for their lies! Good people eat meat!

[ByzantiumBhuka]

There are three great conflicts in this world.

First is between the forces of Good and Evil, as exemplified by the angels' and fiends' opposing goals of purification and corruption.
Second is between the forces of Law and Chaos-- the war between order and entropy, between devils and demons.
The third is perhaps the most important of all: the battle between the forces of Plant and Dwarf.

[snowblizz]

The third is perhaps the most important of all: the battle between the forces of Plant and Dwarf.

I thought it was Plant's vs Zombies.

[denthor]

All dwarves are non-good, you heard it here first.

They like mushrooms.

Afterall you eat the right mushrooms 🍄 you get big and toss fireballs.

I will show myself to the plumbing department now

[Manga Shoggoth]

The third is perhaps the most important of all: the battle between the forces of Plant and Dwarf.

I thought it was Plant's vs Zombies.

If the Dwarves have been drinking enough it's entirely possible, but they have ferocious resistance to alcohol.

That or restrict the early morning coffee.

[Snails]

And there isn't a carnivorous plant in sight which are associated with evilness for some reason.

How P'lantdins of Vengeance must defend the herbal peoples is oft misunderstood by meat-based creatures.

[a_flemish_guy]

They like mushrooms.

Afterall you eat the right mushrooms 🍄 you get big and toss fireballs.

I will show myself to the plumbing department now

mushrooms aren't plants though (they alongside things like mold fall inbetween plants and animals as a category)

[hamishspence]

True. But in D&D, mushroom creatures have the plant type.

[Peelee]

There are Evil plant-lovers.
They cultivate plants like kale and quinoa and then eat them. And then these vegetarians go around trying to make other people participate in their horrible rituals by using body-shaming and false claims such as environmental sustainability and health benefits.

Don't fall for their lies! Good people eat meat!

"Vegetarian" doesn't mean "healthy". Cheese pizza is vegetarian. Fries, potato chips, tons of things for people who don't enjoy qinuoa or kale.

[Trafalgar]

There are Evil plant-lovers.
They cultivate plants like kale and quinoa and then eat them. And then these vegetarians go around trying to make other people participate in their horrible rituals by using body-shaming and false claims such as environmental sustainability and health benefits.

Don't fall for their lies! Good people eat meat!

I agree! {Scrubbed} serving people Quinoa should be crime with a lengthy prison sentence..

[Dion]

There are Evil plant-lovers.
They cultivate plants like kale and quinoa and then eat them.

You know what’s yummy? Quinoa and kale mixed together. There’s a recipe for “southwestern kale power salad” on the Cookie and Kate website with Kale, Quinoa, and black beans that try to always keep a bowl of in my fridge.

(Well, sort of. Lots and lots of substitutions. I don’t think I’ve ever actually followed the recipe. But always salt, kale, quinoa, black beans, plus whatever dressing and additions looks good this week.)

[Kerching]

You know what’s yummy? Quinoa and kale mixed together. There’s a recipe for “southwestern kale power salad” on the Cookie and Kate website with Kale, Quinoa, and black beans that try to always keep a bowl of in my fridge.

(Well, sort of. Lots and lots of substitutions. I don’t think I’ve ever actually followed the recipe. But always salt, kale, quinoa, black beans, plus whatever dressing and additions looks good this week.)

Die, evil plant lover!

[elros]

I wholeheartedly agree. People who take good care of their plants are Good people indeed.

Finally, someone gets it!

[mjasghar]

There are Evil plant-lovers.
They cultivate plants like kale and quinoa and then eat them. And then these vegetarians go around trying to make other people participate in their horrible rituals by using body-shaming and false claims such as environmental sustainability and health benefits.

Don't fall for their lies! Good people eat meat!

Ironically there was a Dragon magazine April fool article about a Planescape faction that had this almost exact attitude

[Finagle]

How do you keep indoor plants from dying in a room with no windows and no electric lighting? Even if there are magical lights, which are shown nowhere, how do these lights emit a wavelength which chlorophyll can absorb? Looks like another major-league continuity error. Serini would have to cast sunburst continually, and she's not even a spellcaster!

[Emanick]

How do you keep indoor plants from dying in a room with no windows and no electric lighting? Even if there are magical lights, which are shown nowhere, how do these lights emit a wavelength which chlorophyll can absorb? Looks like another major-league continuity error. Serini would have to cast sunburst continually, and she's not even a spellcaster!

The daylight spell should do it. Even if it doesn’t, there’s probably a medium-tier magical item for that.

[Silent Wrangler]

What's this pro-plant propaganda?
Plants managed to genocide almost all life on Earth with deadly oxygen! We literally are mutants evolved to survive in this post-apocalyptic oxidizing hellscape.
The dwarves are Good people, the only ones who at least partially preserved the memory of who is the enemy of all life.

[Metastachydium]

What's this pro-plant propaganda?
Plants managed to genocide almost all life on Earth with deadly oxygen! We literally are mutants evolved to survive in this post-apocalyptic oxidizing hellscape.
The dwarves are Good people, the only ones who at least partially preserved the memory of who is the enemy of all life.

Now, you must stop spreading ugly lies and slandering all those nice planties!
First of all, cyanobacteria were responsible for the Great Oxygenation event and cyanobacteria are not planties. They are funny blue prokaryotes.
Planties evolved a lot later to keep us all alive and how do those horrible scumbag Evil dwarves repay them for this? By trying to kill them all (which would also kill the dwarves, but these Chaotic Evil monstrosities care little about that)!
Planties are Good and those who like them are also Good. Planties are life! Dwarves are death! Death to the dwarves!

[KorvinStarmast]

They like mushrooms.

According to The Fellowship of the Ring, hobbits like mushrooms, therefore hobbits are dwarves.

You know what’s yummy? Quinoa and kale mixed together.

My wife agrees. She makes a dish with those two and chunks of chicken, and onions. Quite nice. I make black bean chili every year (during Lent) that is vegetarian: no meat. I have had a few people marvel that there isn't meat in it, based on the texture and taste. I am pretty sure that it's on our menu for next week, based on my wife's plans.

How do you keep indoor plants from dying in a room with no windows and no electric lighting?

Magic.

[snowblizz]

Magic.

Lack of Magic would explain why I can't keep plants alive with windows and electric lighting both.