Senran Kagura 2: Deep Crimson is actually something of an increasing rarity in the modern games sphere: it's a sequel that actually rewards knowledge of its predecessors rather than acting as a standalone story or reboot. For sure, you can play through Deep Crimson without having played Senran Kagura Burst or Senran Kagura Shinovi Versus — despite the "2" in the title, this is actually the third in the series canonically, or fourth if you count the original Japanese release of the first half of Burst as Senran Kagura: Portrait of Girls — but you will get far, far more out of it if you have knowledge of the setting, characters and backstory of what's going on.

Senran Kagura as a series concerns itself with the happenings in the secret world of the shinobi. Trained in secret at specialised academies, shinobi are split into two main groups: "good" and "evil". "Good" shinobi follow orders, help people, Do No Wrong, that sort of thing. "Evil" shinobi do the more shadowy work that is more traditionally associated with those of the ninja persuasion — assassination, espionage and generally being a bit of a bastard without anyone finding out about it until it's much too late.

Life can't be interpreted in such black-and-white terms, however; there are myriad shades of grey, and this becomes particularly apparent over the course of the Senran Kagura series' overarching narrative threads and themes. In Senran Kagura Burst, the "good" shinobi of Hanzou Academy came to understand a little more about their "evil" Hebijo counterparts and that they weren't so different despite their theoretically opposing ideologies; in Senran Kagura Shinovi Versus, we learned the truth about this stark good-evil divide: it's an artificially created construct intended to provoke bloodshed between the two opposing sides, the net result of which lures horrific creatures known as youma out of the darkness so they can be slain by high-ranking shinobi.

In Deep Crimson, the questions over what "good" and "evil" really mean are further raised when the Hanzou students are tasked with initially capturing and then slaying a young girl called Kagura. Kagura, it seems, is destined to fend off the youma in particularly spectacular fashion, so surely the "good" shinobi want to keep her safe rather than splatter her over the nearest wall? Being good little, well, good shinobi, though, they set about making preparations for their mission, because good shinobi follow orders and don't question them. It takes the "evil" shinobi of Homura's Crimson Squad — the former Hebijo students — to convince them to think for themselves and realise that questioning this sort of drastic action is really probably okay if you stop to think about it for just a moment or two. And indeed, there's quite a lot more to Kagura than initially appears.

In Senran Kagura Burst, the relationships between the Hanzou and Hebijo girls was explored through each of them fighting one another and coming to an understanding with their opposing counterpart. It was revealed that "evil" is actually a more inclusive concept than "good" in the world of Senran Kagura, since "good" can turn people away for "not being good enough", while "evil" accepts everyone, no matter how nice or nasty they might have been in the past. Indeed, Burst's storyline — particularly the Hebijo-specific path — takes great pains to humanise the Hebijo girls and depict them as interesting, flawed and often tragic characters who all have their own reasons for turning to the darker path.

In Deep Crimson, these relationships are further explored in a number of different ways, both through the narrative and through the game mechanics. A significant addition to Burst's 2.5D brawling action is the ability to play missions in cooperative pairs, either with another player on a second 3DS system or with the AI taking control of the other character and you being able to switch the one you're in direct control of at will. The game's narrative makes a point of putting "opposing" — or perhaps it's better to say "complementary" — characters together; here, rather than fighting against each other, as in Burst, the girls come to understand one another better by fighting alongside one another against the shared threat of the youma. This doesn't, of course, preclude the fact that a number of comic misunderstandings lead to physical altercations between these pairs at several points in the story — Senran Kagura as a series has always known how to strike a good balance between pathos, drama and humour — but the net result of all the girls' battles right up until the end of the game is that they all come to understand, appreciate and like one another better.

This paired-up action is more than just a gimmick, too; the way it's presented really creates a strong sense of these characters being real people and having actual feelings towards one another. Whether it's the tomboyish, loudmouthed Katsuragi giving the emotionless Hikage an enthusiastic high-five after a successful combat or the dour but utterly besotted Yagyuu catching her darling Hibari in a perfect princess hold after a joint special attack, the game's beautiful animations are absolutely packed with personality, giving each character both a unique look and feel, making them all instantly recognisable.

This uniqueness extends to the way each of the girls plays as well. Far more so than in Senran Kagura Burst, at least, each girl has a very different fighting style, with their own unique button combinations required to unleash combo attacks and specific moves. While you can get away with button-mashing to a certain degree early in the game, once you start fighting more powerful bosses — and even more powerful individual enemies — factors such as positioning, launching, air control and dodging become significantly more important, and there are even some RPG-style status effects to inflict and contend with, just to make things that little bit more interesting.

Each character's three special moves are unique, too; while some are simple area-effect nukes around the character position, others are charge attacks across the arena, good for cutting through swathes of enemies, while others have more specialised uses that can turn the tide of battle in your favour. Of particular note is Haruka's "Death Kiss" move, which charms anyone hit with a large heart-shaped projectile and prevents them from attacking for a brief period; frustrating and combo-breaking when it hits you, massively useful when you're able to do it yourself.

Unfolding across five separate chapters — each with an escalating focus and scope from the previous — and culminating with some dramatic moments of personal growth and epic conflict in the final chapter, Deep Crimson's narrative is a strong one that is paced well and feels like it's the series really hitting its stride. While Burst in particular felt like it was more concerned with introducing the characters and their relationships with one another — no bad thing in a series as characterisation-focused as this — Deep Crimson feels like the overall narrative of the series is moving significantly forwards. The characters aren't treading water: their personal growth in the previous installments is acknowledged and used as a basis for this game's narrative to build on, and this is where the particularly rewarding aspect of complete series familiarity comes in. It has, so far, been an absolute pleasure to witness these girls growing up and finding out more about themselves, their place in the world as people — and their place in the world as shinobi.

As I say, you can absolutely get some appreciation out of Deep Crimson if considering it in a vacuum, but the Senran Kagura series as a whole is at its most rewarding when you take in every piece of information available out there: creator Kenichiro Takaki and his team have created a very strong and believable setting and sense of context across these games, with some wonderfully human-feeling characters that interact with one another in relatable, believable ways — even when they're being silly rather than serious. Like other prolific Japanese series such as Neptunia, the cast has transcended its original context to become a convincing set of "virtual actors" who wouldn't feel out of place in situations other than fighting for their lives — indeed, we've already seen them put their weapons down and do other things in the immensely silly (but immensely entertaining) Senran Kagura Bon Appetit — and I sincerely hope that we see a lot more of these girls in the coming years.

Fortunately, I needn't lament that my time with them has come to a close with the conclusion of Deep Crimson's story, since Estival Versus has just released and is eagerly awaiting insertion into my PS4. More thoughts on that to come when I've spent some time with it.

Oh, hold on now, I didn't answer the question in the headline, did I?

YES