Nature and identity with

means nature, characteristic, or sex. It refers to what is innate to a person or thing.

Etymology

This kanji is an ideogram built from 忄 (heart) and 生 (birth), giving the sense of what is innate or born into a thing.

Compatibility

(Compatibility)

相性(あいしょう) means compatibility between people or things, whether their qualities work well together.

It combines (mutual) with 性 (nature) to show the nature between two things (their compatibility).

Manga panel from それでも歩は寄せてくる showing example of Compatability fortune with 相性.
それでも歩は寄せてくる » Volume 15 » Page 17

At the school festival, Ayumu and Urushi stop by the affinity fortune telling booth while Maki is on duty. Maki holds out a box with an opening on top, and says the need to pull out a single card together.

マキ:
「0〜100の点数(てんすう)()いてるからそれで相性(あいしょう)がわかるんだよ」
“Your compatibility is determined by the score written from 0 to 100.”
「もちろん100(てん)一番(いちばん)いいやつ」
“”
(あゆむ):
二人(ふたり)でですか?」
“Together?”
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Gender

(Woman)

女性(じょせい) means a woman or adult female.

It combines (woman) with 性 (sex) to show the female sex.

Manga panel from 名探偵コナン showing example of Experiencing danger during hide-and-seek with 〜目にあう.
名探偵コナン » Volume 9 » Page 28

During a hide-and-seek game at the park, Ayumi hides in a car trunk and falls asleep. She wakes to find the car moving and discovers a bag of money, a slimy saw, and what seems like a severed head. Conan, tracking her via their Detective Boys badges, prepares to pursue on his electric skateboard. Genta and Mitsuhiko join him on it, but Conan urges them to stay behind due to the danger.

元太(げんた):
歩美(あゆみ)(あぶ)ない()にあってんのに、じっとしてられっかよ!!」
“Ayumi is in danger, so how can I just stand by and do nothing?”
光彦(みつひこ):
「そうですよ!! 女性(じょせい)をお(まも)りするのは(おとこ)義務(ぎむ)ですからね!!」
“That's right! It's a man's duty to protect women!”
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(Man)

男性(だんせい) means man or adult male.

It combines 男 (man) with 性 (sex) to show the male sex.

Manga panel from 名探偵コナン showing example of Promising suitors with 有能.
名探偵コナン » Volume 9 » Page 120

Detective Mouri is invited as a special guest to the birthday party for Reika, daughter of the Yotsui Group’s chairman. At the event, Reika announces her intent to marry.

霊化(れいか):
「そう(おも)って今日(きょう)のパーティーにも、有能(ゆうのう)そうな男性(だんせい)数人(すうにん)、お(まね)きしてますわ…」
“With that in mind, I've invited several promising gentlemen to today's party...”
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(Opposite sex)

異性(いせい) means the opposite sex or a person of a different sex from oneself.

It combines (other) with 性 (sex) to show the other sex.

Manga panel from くノ一ツバキの胸の内 showing example of Attraction to the opposite sex with 異性.
くノ一ツバキの胸の内 » Volume 2 » Page 41

During a ninja training exercise, Tsubaki disguises herself as the teacher’s assistant in the hope of getting close enough to take the teacher’s mask. When the teacher unknowingly reveals that keeping boys and girls separate has been aided by lying to the female ninjas about men being scary, Tsubaki accidentally drops her disguise. The teacher has no choice but to take Tsubaki into her confidence and explain the reason for the separation, starting with the word “love”, of which Tsubaki is unfamiliar.

ハナ先生(せんせい):
異性(いせい)()きという(おも)いを()せることだ。」
“It means harboring feelings of affection for someone of the opposite sex.”
年頃(としごろ)になると(みな)経験(けいけん)すると()く。」
“I hear that everyone goes through this when they reach a certain age.”
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Qualities

(Performance)

性能(せいのう) means the performance or capability of a machine or product.

It combines 性 (nature) with (ability) to show inherent capability or performance characteristics.

Manga panel from 名探偵コナン showing example of Tracking device performance with 性能.
名探偵コナン » Volume 2 » Page 57

Professor Agasa gives Conan a tracking device. He eagerly looks for an opportunity to see how it works.

コナン:
「そうだ!(らん)()けてこれの性能(せいのう)(ため)してみっか!!」
“I know! I'll stick it on Ran and see how it performs!!”
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