Who's who: the spotters guide to the Olympic Deities
Apollo - God of the sun, and various other things notably healing, music and prophecy. It's an eclectic mix, to say the least. [Greek = Apollo] (Octavian's relative of some description, fairly distant)
Diana - Maiden goddess of the hunt and moon. Tends to disdain men, so if you do meet her, be uber-respectful, and if there are any girls on your team, let them do the talking. Also, the maiden thing is not a joke, so under no circumstances attempt to flirt. Well, it's never a good idea to flirt with the gods, but especially not with the ones who've taken vows of chastity: you will be turned into something and die a horrible death [Greek = Artemis]
Epione - Goddess of the soothing of pain - literally the queen of painkillers. Married to Vejovis, god of healing, a match made in heaven (almost literally), and one of the most frequently called upon and worshipped gods on Temple Hill, because after a day of training you really want Epione to smile on you. Not one to annoy, unless you really are masochistic even by Roman standards. [Greek = Epione]
Fortuna - Goddess of luck and chance. Any time you really hope for something luck based? You're calling on Fortuna, whether you know it or not, so every time you cross your fingers? Yeah, that counts as a prayer, so you've probably prayed to her plenty of times without even knowing about it. [Greek = Tyche]
Gelos - Spirit of laughter, absolute riot at parties, tends to hang out in comedy clubs and anywhere people are trying desperately to keep a straight face.
Jupiter - God of sky and lighting; King of the Gods, with many epithets and legends. My father, though due to his divine work commitments we bond at godly arm's reach. [Greek = Zeus]
Juno - Goddess of women and marriage, protector and counselor of Rome. My godly stepmom and patron, though again she tends to watch me from afar, and exchange letters at the appropriate holidays rather than popping by for tea every Saturday. [Greek = Hera]
Lupa - Wolf goddess who raised the twins Romulus and Remus, who went on to fight to the death over who got to name their new city. Romulus won, hence why it got named Rome. Lupa is also the godly head of the Legion: the praetors actually run it and make most of the decisions, but Lupa will advise when she feels necessary. She's one camp director you do not want to cross. Good with small children.
Mars - God of war, with special links to Rome. The Field of Mars is our own personal "war ground", used in war games and for the occasional major training exercise, which admittedly usually end up turning into something approaching actual war. [Greek = Ares]
Mercury - God of travelers, communications and thieves. Also poetry, for some reason, though Apollo also does some of that (whether the other gods like it or not). The fleet footed messenger of the gods, Mercury is always on the move, and has some handy flying sandals to help him out. One of Jupiter's godly sons, so technically my half brother, I guess. [Greek = Hermes] (Pablo's dad)
Somnus - God of sleep, but don't take that lightly. He may be responsible for you catching forty winks or a solid eight hours, if you ask really nicely and he's in a good mood, but he also punishes people who doze off when they're not supposed to. Like, falling asleep on guard duty at Camp Jupiter comes with an extra high risk of being unable to sleep for the next week. [Greek = Hypnos] (Natalino's great great granddad)
Terminus - God of boundaries. Literally the ancient Roman god of border control and passport checks, with non-optional extra advice on Correct Roman Legionnaire Attire and Grooming. His statue at Camp Jupiter lacks arms, but he's still perfectly capable of magically poofing weapons out of your hands or giving you a nasty shock, so be polite and do as he says.
Trivia - Goddess of magic and crossroads, frequently mistaken as goddess of small and usually pointless pieces of information. [Greek = Hectate] (Melody's mom)
Vejovis - God of healing, generally of humans - there are other gods who focus on, for example, cattle. Probably recieves the most offerings and thanks at Camp Jupiter, because we tend to need his blessings a lot. [Greek = Asclepius] (Bobby's granddad)
Venus - Goddess of love, with a sideline in beauty. Like many gods, a case of "take at face value and you are doomed", so don't make the mistake of thinking that being lady love makes her - or her kids - pushovers. They will tear you apart, usually while looking flawless. [Greek = Aphrodite] (Victoria's great great great grandma)
Vulcan - God of the forge and all things mechanical. Promptly thrown off of Olympus soon after being born for not fitting the required godly image, but builds machines as beautiful as he is not. [Greek = Hephaestus] (Alexei's dad)
Glossary
Denarii - Ancient Roman coins; don't work in vending machines and only use in a mortal shop if you want the police called, but can be spent in New Rome and in a few other select demigod places.
Dis - One of the three terms for the underworld (yeah, you heard me: Three. Try to keep track of them all. This is my favourite).
Hades - One of the three terms for the underworld (this is probably the one you've heard of).
Lares - Guardian deities or spirits, slightly see through and nearly all somewhat old fashioned, nearly all annoying.
Pilum - Roman spear. Try to avoid getting stabbed with - it hurts.
Pluto - One of the three terms for the underworld (confusingly, Pluto the god is actually nameless: he can be called Dis, Hades, or Pluto, after his realm. We generally go with Pluto, though).
Probatio - The probation rank of the Twelfth Legion, i.e. bottom of the food chain.
Rudes - Roman practice swords made out of wood, because even we get fed up patching each other up and cleaning blood off of our actual swords sometimes.
Via Praetoria - The main road through the city of New Rome, leading into Camp Jupiter, the Legion's base, through the Praetorian Gate.
Via Principalis - The main road through the middle of Camp Jupiter itself, running perpendicular to the Via Praetoria