Linda: Sensor? Hell, no. She's extremely intuitive and also perceptive. Linda is an ENFP for sure.
Fe-Ne. Her Ne is minimal and only serves to get things going socially.
Tina: Sometimes I see her as an INFP, but mostly she gives me an ISFJ vibe. She hates breaking rules and has a hard time with changes. She's also way to responsible for a stereotypical INFP.
Why I went with 6 (9 is possible too) since otherwise she is a total INFP. Her rule abiding seems more out of a personal, set moral code (Fi) and a fear of lack of support/safety (6). Also, Linda doesn't really understand her but tries to nurture her nonetheless, which is about as far as ExFJ-IxFP relationships usually go. If either of them were unhealthier, their Fi and Fe would clash to no end.
I think I actually remember Louise and Linda rubbing the wrong way a few times.
Louise: Louise, a feeler???? What the freaking fuck????? She's the stereotypical ENTP; she loves chaos, fighting, debate. She adores taking charge of things, which sounds like an ENTJ, but she's not as good in planning as a typical ENTJ would be. The episodes in which she expresses her emotion there's an obvious amount of shame. In the 4th season finale, when they think Bob's going to die, she says something that sounds like "I love you so much, but please never mention it ever again".
Knew I would get flack for that, lol. Yeah, ESFP is out there considering what most other people think. My own initial thoughts were ENTx, but I went with ESFP because she clearly uses Ni/Se and Fi/Te but her scheming is in-the-moment and doesn't lead up to any large goal, and generally resembles the scheming of Se-dom cartoon characters. For example, think of Eddy from Ed Edd n Eddy: he is also caught up in in-the-moment plans but Louise has a better finesse because of her Te practicality and force, while Eddy's ideas are a lot more grandiose because they rely on Ti theories and are backed up by Fe schmoozing (He's ESTP).
TL;DR, she spends all of her time fucking around with people and trying to get what she wants in a bold Se way rather than building up to any long-term goals or generating unheard of ideas. (So, ENTJ, ENTP, and ESTP are all ruled out.)
Also, if she is ESFP, then at that age her Fi wouldn't be developed at all, plus a lot of Feelers hide behind tough shells. Fi is usually more comfortable cultivating feelings privately than sharing them. She's definitely the most difficult to type.
Ne-dom. Compare him to Louise or Bob who both clearly have Se in their stack somewhere and it's obvious (Louise also looks up to Bob over Linda because of their shared Ni/Se while everyone else is Si/Ne and don't really get them.) He's all about exploring ideas while Louise has a grounded Se worldview. His style of humor is very Ne/Si and a bit similar to Linda's, except turned up to eleven.
And another thing to consider -- looking back at what I said about Louise-- is that
all three of the kids are still early in development, so they might not resemble their types.
Or, more accurately, it's a cartoon and their personalities won't be perfectly cut out.