Are side activities exclusive to each character?

[Arthur]

Playing the game for the first time here, and I'm wondering: Are some activities exclusive to some characters? For example, I unlocked triathlon contests with Michael after finishing a sidequest with him (the one with the running lady). Can I compete in those with Trevor or Franklin? I was thinking of finishing some races while I was playing with Trevor but some of them felt way too hard, and I was wondering if I'm supposed to do those with Franklin and his special ability.

Also, asking this because apparently I can only take pictures of animals (and send them to that contest) with Franklin. Aside from that, which activities are exclusive to which characters?

(also, no spoilers please, this is my first time playing GTA 5)

[kr3m]

yes, there are certain characters that are scripted or intended to flow or have dialog with a particular protagonist. Such as the older couple fond of Trevor for his similarities to a Hollywood icon they adore.. Or Michael saving a church goer from a life long mistake.. or the couple Trevor drives up into the hills..

Tough to give examples without spoilers, but I think these are vague/cryptic enough to still leave discovery and enjoyment on the table.. but sorry if I ruined anything..

[kr3m]

Originally posted by Arthur:

which activities are exclusive to which characters?

Michael's Yoga, Trevor's Rampages and Franklin's street races

[alexismachine]

Do the kiplom side missions on Michael

[globefish23]

Yes.
All of the Strangers & Freaks side missions are exclusive to one of the three protagonists.
For Barry (stoner) and Marry-Ann (runner) it's different variations for each.
https://gta.fandom.com/wiki/Strangers_and_Freaks (Check the color coding in the table!)

Random Events on the other hand can be done with any of the three protagonists.
(Trevor has alternate outcomes for a few of them by going to the Altruists.)
https://gta.fandom.com/wiki/Random_Events_in_GTA_V