LUPIN RELATIONSHIPS
Fujiko Mine - There's no denying it, the man loves her in ways no normal man would--she's cruel and tends to take his hard work right from under him, but he loves that side of her; he believes betrayal is a right exclusive to the fairer sex only. He may act goofy around her and constantly try to get in her skirt, but he genuinely loves her and would definitely take a couple of bullets if it meant her safety.
Jigen Daisuke - His best friend and partner in crime, the two constantly poke fun at the other, and they've been known to get in a few arguments. With that in mind, they're two peas in a pod and know each other extremely well. It's surprising to see one without the other, at any rate. A lot of Lupin's faith in instilled in the bearded gunslinger, trusting his life to him in any case of danger.
Ishikawa Goemon - Goemon is his wonderful samurai warrior, and like Jigen he puts the utmost trust in his friend in scary situations. While he's not as connected to the hip with Goemon as with Jigen--the samurai travels quite often in peaceful--he is close to him and can enjoy a good laugh with him and Jigen; he respects the ronin's skills and ideals, finding them something good to aspire to were he not a sneaky thief. He's able to read Goemon better than a lot of people, getting those subtle hints and emotions just by looking at him.
Koichi Zenigata - He's the first to admit Zenigata is overly persistent, but he likes having someone who can provide a good chase on an otherwise routine heist. Over the years he's actually bonded with the zealous member of ICPO, even going as far as calling him 'Pops/Tottsan'. And even though Zenigata is technically his enemy, he respects him; and there have been many occasions where his 'enemy' becomes his ally, especially with all the evil villains they incidentally come across. A love/hate relationship at its finest.
Tulio - Speaking of love/hate relationships, the two constantly insult each other. Despite Lupin's jabs, he likes Tulio's style and connects with him on a lot of levels--one, being that both cherish their partners silently, two, their love for the ladies, and three, their ability to strategize and formulate plans. While he doesn't openly say it, he's taken a shine to the Spaniard and his partner.
Miguel - He hasn't bonded as much with Miguel, mainly because the blond-headed dork has been having his time adjusting to regaining his memories. However, they're friends in a loose sense of the term, and Lupin thinks the man is too nice for his own good (Lupin's been too nice for his own good as well lately, though he tries not to openly admit that). Miguel unknowingly makes the thief reflect on his own partners.
Rinali Li - She young and sweet, something Lupin adores; less of a flirt with her and more of a 'father-figure' (he'd rather not refer to it as that, as he's young and spry, come on) and likes to talk to her about the simple things. He loves that she is a lover of literature--though he doesn't have his nose in a book too often, he believes its a good gateway to knowledge and poise. He has a feeling she's bound to give some lucky guy a very wonderful girl.
Nefertari Vivi - Lupin has a very big soft spot for princesses, and Vivi is no exception. Like Rinali he thinks she's completely adorable and a great addition to the many girls of royalty he's bumped into. Her sweet nature compels him to make her happy at all times. Of course, like Miguel, she brings back some of those old memories he tends to not dwell on, the most obvious being Clarisse and Queen Sakura of Vespania.
Paprika - She's a very beautiful lady! As a member of his 'crew' now, he's determined to keep her happy and relaxed; he loves seeing that goodwill and sweetness in her that radiates her personality, and personally finds her and Goemon's relationship 'just adorable~!'.
Mello - While he likes that the boy can hold a sharp conversation, he doesn't see the danger or big deal behind the kid (yes, definitely 'kid'). He's aware that Mello is capable of being a complete dick, and that he can do some pretty diabolical or hurtful things, but in the end the thief believes he's seen worse (unless proven otherwise). He finds Mello is best at trying to insult someone, but the problem with that is it's hard to hurt Lupin with silly words.
Nico Robin - He loves the tough, smart women, and that's exactly what she is to him. He doesn't flirt with her as much as the norm, mainly because he knows she can see right through that sort of thing, but that doesn't mean he won't remark on her beauty or incredible talents from time to time. She's a good way to have a civilized conversation, and he's more than once told her a few of the more secretive or private things in his lifetime.
Michiko Malandro - She's very beautiful and easy to woo, so he enjoys amazing her with simple tricks and a sharp or lovey-dovey wit. He knows she's a bit brass or brazen about things, but he doesn't mind it, even if he's more for the reserved sweethearts. Overall, he loves her spunk and thinks she's charming in her own way.
Percy Jackson - The kid's a good one. He's shared some fun stories with him and over all likes the youthful humor Percy has. While he knows Percy's against his thieving, the two seem to get along just fine.
Chel - He doesn't quite know her very well, though he see's her as a possible less-cruel version of Fujiko. He can tell she's good at getting things done, and does indeed find her beautiful as to be expected; however, he's more than aware she's an off-limits acquaintance, as he's not one to try and shamelessly flirt with a fellow man's lady.
George Lass - She's an interesting, to say the least. For her age she's very intelligent, a quality Lupin likes in a woman/girl. While he's not attracted to her in the way he is with older more majestic femme fatales, he thinks she's got a pretty face and a sharp wit. And the fact that she can speak some French makes her an insta-friend.
Nami - Eeeee, she's such a babe. He's the general type of girl he flirts with as much as possible, rain or shine;
he's also more than willing to go on a heist with her, if even to be scammed ala' Fujiko-style. She loves the cash, and he loves the ladies. They go hand in hand.
Lust - He's only really spoken to her once, but from what he's seen she's a pretty dangerous lady--nothing new in his profession, but still something to watch out for. He loves her looks and will no doubt flirt as much as he can, but keeping a distance may prove the best choice. Even so, such a nice cleavage~!
Araragi Koyomi - He's a hilarious little weirdo. That's all Lupin sees whenever he reads the boy's stuff. So he doesn't mind messing with him at any moment he's got.
Usopp - To him, the kid is hilarious to talk to. He knows better than to take some of what the guy says seriously, but the conversations that may stem from it are fun and light. His types of talks.
Tsuna - Like Araragi, the boy's personality makes him a great target for teasing.
Gokudera - See 'Tsuna'. Ha, what a funny KIDDO.
Kaku - What a swell guy. He and Lupin seemed have started a nice little acquaintance-ship, and he's even promised a drink or two at a bar with him.
Matt - he's only met him for a brief moment, but from what he sees the boy is mysterious and not much of a talker. But he gave him a cigarette, so the kid's not so bad. Even for a Mello lackey.
Falis - A bounty hunter?! ... Phew~! She goes after monsters more...
Luffy - Dear god he's like a human vacuum.
Zoro - Who now? That guy with the green hair?