Jerk with a Heart of Gold: Very greedy and self centered and is certain to overprice her services a lot while paying her employees peanuts. That said, she does care for her companions' life and goes berserk or nearly has a Heroic BSOD when Yokoshima is killed and genuinely cares for Kinu's well-being. There was also one instance where she chose to not do her job and get the money.
Greed: She could easily take that spot in the pantheon of this site.
Meaningful Name: Shiina came up with her name as an oblique reference not just to the goddess Aphrodite, but also the financial headaches Japan was going through when the manga was first published. Guess which character obviously avoided getting hit with problems...
Time Travel: Her family from her mother's side has this as an ability that's triggered by lightning.
Tomato Surprise ((It turns out that her existence began in the Heian era as the artificial demon Mephistopheles. It helps explain why she's Chaotic Neutral, for starters...)
Tsundere: Type A. She lets down her guard against Saijo, Kinu and her family. She is also arguably a type B since she's her harshest around Yokoshima who's her love in her former life and also supposedly her future husband
Crouching Moron, Hidden Badass: Acts like a perverted idiot most of the time, but plenty of people have noted how tenacious he is at getting a glimpse of some booty (though he fails most of the time) and people like Shouryuuki and Mikami's mother have noted his incredible growth potential which, according to the latter, surpasses even Mikami and Saijo. Heck, he managed to almost beat Mikami during his special training (he had aready beaten twice the number of monsters Mikami did on that same training her first time around), only losing due to hesitation. Heck, even in the first chapter clearly stated that has enormous spiritual powers.
Hidden Depths: His old friend noted that those who actually took the time to know him will appreciate his good qualities. He did attract at least 3-4 ladies that we can see, after all, some of whom were supposed to be his enemy.
Idiot Hero: Between TNA and his life, its always TNA.
Generation Xerox: He may not look like his parents too much, but his developing relationship with Mikami bore such a startling similarity to his parents' that Mikami became worried on an unconscious level...
The Chew Toy: Barely a file goes by without him falling prey to Amusing Injuries or some other aggravation, whether because of Mikami's neglect, his own overactive libido, or whatever else the cosmos thinks it'd be fun to visit on him. Even after he saves the day.
Iron Buttmonkey: The only thing that seems to work on him is cutting and stabbing attacks...
Weirdness Magnet: Lampshaded by Mikami how he attracts all kinds of female supernatural beings. Ironically enough, this includes her past self...
Meaningful Name: Although Ironic Name would work better—Tadao means "loyal husband". Considering how he'll try to convince just about every other attractive female around his age to help him lose his virginity...
One file reveals that, yes, he got married to her 10 years later.
Took a Level in Badass: Eventually learns to fight on his own with his spiritual lightsaber and small spiritual balls that can create any effect as long as they're one kanji long. His future self can travel through time on his own power, which not even Mikami and her mother, whose super-special ability is to travel through time, can do.
Deal with the Devil: When she first began (unofficial) ghost sweeping at the age of 15, she did so with the aid of a bound demon named Belial. Shiina never explains in the sidestory what happened to Belial between then and the main series, when we see him locked up.
Defeat Means Friendship: He was presented as an enemy to Mikami at first, but two defeats and one case where they need to work together makes him a more neutral character.
Mayfly-December Romance: He abjured a relationship with Princess Maria precisely because he knew he'd outlive her, and she deserved a more mortal mate. Nonetheless, he made sure her image lived on as the mystic robot Maria.
My Skull Runneth Over: Because his brain has become completely full with information, learning something new means that one of the earliest things still remembered gets overwritten. It really says something that he can understand how the Tenshi Luopan works at first sight, but at the same time forgets what 2+2 results in...
Also, he can't remember how to build Maria.
If the dream at the end of the series is true he eventually he does manage to mass produce androids. But in a somewhat bitter-sweet turn he has also forgotten about his past adventures with Mikami and company.
Ridiculously Human Robots: Although it makes sense here, since she was designed in part as a memorial to an old acquaintance of Dr. Chaos's. Played with when a love potion makes her fall in love with Yokoshima and tries to kiss him... with a metal head and enough force to destroy concrete walls...
The Beastmaster: She has a retinue of twelve shikigami under her control, but no thanks to her complete lack of self-confidence, it's very easy for her to lose control over them. When that happens, Anything standing around her turn into ruins.
Berserker Tears: She cries and her Shikigami goes ballistic...which happens a lot.
Cloud Cuckoo Lander: She could function somewhat normally in society, but when Nightmare invades her mind, he has no idea what goes on in her head...so much so he had to abandon his attempt.
Reincarnation: During the battle on the moon, she had to do this after getting shot by Mikami. She did it by performing mouth-to-mouth on Yokoshima and nearly going out Chest Burster style into a younger, "fresher" version of herself.
Dangerous Forbidden Technique: Unlike Innen and Kankuro, Yukinojou is very careful with the Masoujutsu from the beginning. Under no circumstances will he let it persist to the point that he risks getting corrupted into a demon. Later on, he decides that he needs more power than that, so decides to find an alternative form of spiritual armor that doesn't have the corruption risk—in other words, not derived from demonic energy.
Heel-Face Turn: He gets so thoroughly disgusted with the lengths Medusa will go to achieve her goals that he renounces her, and ultimately even upgrades his infernal-energy armor into a less dangerous version with Hanuman's help.
Perpetual Poverty: Her family was cursed with constant poverty through a binboukami. It didn't exactly help that, until they met Yokoshima, the binboukami's attempts to turn himself into a kami of fortune never got anywhere.
Eyes Do Not Belong There: See all those eyeball accessory looking things all around her body, on her arms, dangling from her ears? They're all real eyes. But she's cute, so we're not complaining.
Meaningful Name: Her name literally means "100 eyes", and she's basically a scout unit who can see great distances.
A God Am I: He certainly acts like this towards his minions, and becoming the sole god of the universe is his ultimate goal. Well, one of the two goals he's willing to accept, at least...
Bad Boss: Poor Dogura, even if it is a restorable automaton...
Big Bad: Though the series doesn't actually have one, he's probably the next best thing since a lot of the series' important events revolve around his actions.
Death Seeker: Ashtaroth couldn't handle the fact that his role as a demon, to maintain the flow of chaos and generally keep the universe from stagnating, meant that he'd be vilified more often than not. As far as he was concerned, there were only two acceptable alternatives—rewrite the whole of reality to his whims, and this.
Through His Stomach: Her exorcism methods include cleaning and cooking up super-delicious and nutritios food.
And Call Him George: Although the threat to Yokoshima and Hyakume doesn't come directly from Papilio, but rather her other pets, who include the likes of Kerberos. Yes, she expects them to get along just fine.
Animal Motifs: She was made from a butterfly, as her name indicates.