This will be long and I apologise in advance, but I've spent the last hours researching and analysing so here we go
Analysis of the flowers in the recent Helluva Boss characters' portraits in the new Spring collection
(or, at least, what I think these flowers are)
Blitzø ~ White geranium: this flower mainly symbolises pure love, but also innocence, purity and protection. While protection is quite evident in Blitz's character, the other three meanings may seem out of place, but that is precisely what they've been doing with Blitz's personality this whole time. He follows the "they think I'm a monster, so I will become one" path, but despite his flaws and self-sabotage he is a nice person, full of love that he does not know how to properly express and he is not really the one to blame for the accident that happened years ago at the circus. He is not the heartless imp he make himself up to be, but a rather simple, hurt guy who's hoping and longing for love
Loona - Purple rose: this is also an interesting choice. The main meaning of this flower is the "love at first sight", but it also gives the idea of an endless love. It is, then, also a symbol of nobility and royalty: this may be a reference to the fact that in the group, she is not only the only one who can read and use the Grimoire, but that has also learned a lot of spells from it (ex: being able to give herself a human disguise). Unless there are also other possible future connections with her and nobility...
With Moxxie and Millie there really aren't any double or secret meaning (or none that I could find)
Moxxie - Hesperis matronalis: this flower is present in many legends, all related to a promise of eternal love and fidelity (of course, this is for his marriage with Millie). I read somewhere that they're also a symbol for loyalty, which may be a reference to his relationship with Blitz (and also something he probably struggled with too, after Chaz betrayed him), and its name "matronali" is a reference to ancient Roman matronae, probably a reference to his mother (who was featured in the merch as well)
Millie - Geranium pyrenaicum: apparently in folklore they were said to counter love spells, which is hilarious considering the serenade Moxxie did to her at Ozzie's, where he literally says he feels under a love spell when he's with her. Maybe it's a way to say that their love is actually real and that it will last, since this flower also symbolises love, joy and health - and in some cases also protection
Stolas - Dahlia: (I'm going to fucking die)(when I tell you I SCREAMED) Yellow dahlias are a symbol of affection and gratitude (THANK YOU BLITZ. FOR MAKING ME SO HAPPY. EVEN IF FOR ONLY A LITTLE WHILE)(kill me now please). These flowers are said to despise cold temperatures since it prevents them from flourishing (call 911 I'm begging you). They also symbolise kindness, dignity, resilience and inner strenght, together with eternal love, and in some cases they're also viewed as a symbol for regality
Octavia - Purple hortensia: oh this is interesting. Hortensia's significance may vary depending on the culture: while in Japan they're a symbol for an heartfelt emotion and apology, in Europe they symbolise arrogance and vanity. I think both these versions apply to Octavia and to her way of, not seeing the world in general, but probabily her now-complicated relationship with her father. She's a bit arrogant in her teenage headstrongness, but she still loves and cares for him. Purple hortensias, then, specifically symbolize a desire to deeply understand (again, definitely in relation to Stolas)
Fizz - Orange carnation: these flowers are said to generally symbolize positive feelings, while the orange ones specifically connotates happiness, warmth, determination and creativity, but also desire and enthusiasm - all qualities that are easily attributable to him.
Verosika - Azaleas: this one is interesting too: these flowers convey a lot of different meanings, but the most typical one is womanhood, femininity, but also passionate love, especially in their red variant. They can also mean "taking care of" (both of one's self or of others, but even "take care of yourself for me"). Another prominent answer, then, was temperance (as per Moxxie and her mother, Verosika too is featured in other new merch products among which there is also a scene of her peacefully sat somewhere in Sloth Ring - where she stayed for rehab). From the trailer it is clear that, at least in one episode, she will have an important role both for Stolas and for Blitz, and maybe we will also have some more information about her relationship with my favourite disaster imp, together with infos about herself and, at this point, a possible recovery for her and her clearly-still-broken-but-she-won't-admit-it heart?
(I'm starting to get tired, I guess y'all are too)(If you even kept reading this far)(I'm almost done, I swear)
I'm putting the sins together simply because their flowers are strictly related to their "sinful roles" and not to their characters
Ozzie - Poppies: I mean, I guess in this case we're referencing more the opium you can extract from them, so lust's and sex's narcotic and feverish effects on people
Beelzebub - White peony: apparently they convey an idea of shamefulness?? Probably what people feel after drinking whatever they can at her parties lmao. Also disgrace and, to a certain amount, wealth and prosperity
Mammon - Mimosa: honestly here the only meaning I want to give is that they smell of piss
LOOK HOW BEAUTIFUL THEY ALL ARE, THEY MAKE ME BELIEVE IN LOVE AGAIN
Okay so, they're all the same flowers, lilies, which in general represent purity, probably in relation to the depth of their love. However, there are additional meanings depending on their collours
M&M - Yellow lilies: symbols of joy, happiness and desire of enjoyment (they're each others' shadows and main interest, this is all too accurate)
Fizzarozzie - Blue lilies: serenity, rebirth and new beginnings (EXACTLY WHAT FIIZ DESERVES AND WHAT THIS RELATIONSHIP IS GIVING HIM)
Stolitz - Red lilies: they symbolize pASSION AND ROMANTIC LOVE, THEY'RE USED TO EXPRESS DEEP FEELINGS OF LOVE AND ITS STRONG INTENSITY
