Below are my main headcanons about all the Adventure verse kiddos. More info about specifically daiken here.

taichi

Birthday: early April 1988
Sign: Aries (sun)
MBTI: ESTP
Top Love Language(s): physical touch & quality time
Sexuality: bisexual slut

yamato

Birthday: early November 1988
Sign: Scorpio (sun)
MBTI: ISTP
Top Love Language(s): quality time & physical touch
Sexuality: gay

sora

Birthday: late February 1989
Sign: Pisces (sun)
MBTI: ISFP
Top Love Language(s): receiving gifts & words of affirmation
Sexuality: lesbian/asexual

koushirou

Birthday: early February 1990
Sign: Aquarius (sun)
MBTI: ENTJ
Top Love Language(s): acts of service & quality time
Sexuality: bisexual
Other Details: austistic

mimi

Birthday: late September 1989
Sign: Libra (sun)
MBTI: ENTP
Top Love Language(s): quality time & physical touch
Sexuality: bisexual

jou

Birthday: early September 1987
Sign: Virgo (sun)
MBTI: ISTJ
Top Love Language(s): acts of service & physical touch
Sexuality: bisexual

takeru

Birthday: mid-December 1991
Sign: Sagittarius (sun)
MBTI: ESFJ
Top Love Language(s): quality time & receiving gifts
Sexuality: pansexual slut
Other Details: PTSD, anger problems

hikari

Birthday: mid-May 1991
Sign: Taurus (sun)
MBTI: INFP
Top Love Language(s): quality time & acts of service
Sexuality: lesbian (but also very into her brother)
Other Details:

daisuke

Birthday: August 8th, 1991
Sign: Leo (sun), Cancer (moon), Aries (rising)
MBTI: ESFP
Top Love Language(s): physical touch & acts of service
Sexuality: (disaster) bisexual, male leaning
Other Details: ADHD, low self-esteem, ambidextrous (but doesn't realize that's rare)

Crest of Miracles
V-mon > XV-mon > (non-gold) Magnamon > UlforceV-dramon

ken

Birthday: July 16th, 1991
Sign: Cancer (sun), Virgo (moon), Scorpio (rising)
MBTI: INFJ
Top Love Language(s): quality time & physical touch
Sexuality: gay/demisexual
Other Details: depression, anxiety, PTSD, chronic nightmares

Crest of Kindness
Wormmon > Stingmon > Jewelbeemon > BanchoStingmon

miyako

Birthday: early June 1990
Sign: Gemini (sun)
MBTI: ENFJ
Top Love Language(s): words of affirmation & physical touch
Sexuality: (disaster) bisexual, female leaning

Crest of Passion
Hawkmon > Aquilamon > Hippogriffomon > Ornismon

iori

Birthday: early January 1994
Sign: Capricorn (sun)
MBTI: INTJ
Top Love Language(s): quality time & acts of service
Sexuality: aromantic/asexual

Crest of Justice
Armadimon > Ankylomon > Brachimon > Cannondramon

general thoughts & headcanons

Just a few thoughts on some of the other ships. These are more headcanons than actual ship preferences.

• Mimi shows Miyako how to kiss and how to get off. That's just a fact.
• Takeru and Hikari date in high school because everyone expects them to, but there's no real love there. Hikari is a lesbian (except for her brother lol), and Takeru is too busy being a slut to really be invested in the relationship. They break up after a boring few months together.
• Yamato and Sora date when Yamato is in denial that he's gay af. Obviously, it doesn't work.
• Taichi desperately wants to have a threesome with his boyfriend and best friend, but Yamato and Koushirou are way less into than him. I cannot imagine this not ending in disaster, but Taichi wants it so damn bad.
• Takeru and Iori are platonic soulmates. I literally cannot imagine Iori as anything other than aroace, so it's hard to picture him in any sort of romantic relationship.

My headcanons for the different sexualities of the other Chosen kiddos...

• Wallace: pan
• Ryou: bi/pan (I'm undecided)
• Meiko: bi, female leaning
• Menoa: lesbian
• Rui: maybe ace??