I do have a few characters that tend to make more of the summer season! Let's talk about 10 of 'em.

Pez often gets most of his work in the summer, going to fairgrounds to do face painting and activities for the kiddos. It's his favorite line of work, even though it's short lived. He's very busy as well since that's a time when cases for the Child Protection Agency ramp up.

Aurcer and his tribe have huge festivals for every season, and summer is no exception. A 48 hour dance festival with a bonfire, huge feasts, and wrestling. He tends to oversee more than participate, but he enjoys a good brawl.

Tiberius takes advantage of the warmer weather to get out earlier and practice his martial arts. He likes to meditate at sunrise if possible, clearing his mind before stretching his body.

Nacres, being a cloud associated with good weather, always tends to go wherever it's spring or summer. Cold weather would slow him down and cause him to be more tired. He enjoys sky surfing when it's nice and hot, since he can't overheat.

Lucius, like most college students, goes back home to spend the summer with his parents. They'll usually go camping a few times during the hot months. He also tries to check out local dance shows to study their choreography for his next semester.

Oriol, as a sort of matador, tends to be busiest in the summer. Sapient 'bullfighting' is just more play wrestling with bull anthros, one trying to blind the other with their cape so they can tackle them.

Ludovic has a sort of 'summer house' in Mercia when the weather gets too hot in mainland Eurish. He doesn't like it, though, because it's just a cabin compared to his manor. He only goes there because it's the only retreat he doesn't have to pay for.

Ecko always feels cold so the summer isn't much different to him from the winter, so he gets a lot of odd looks for wearing his bulky jacket. He likes to hit the lakes and fish, since it's quiet.

Ignatius (Timeline 3) will go out even in the most blistering, insufferable heat and just explore. The park, museums, random abandoned areas... he's capable of tolerating heat up to 200F (93 C) and literal boiling temps only cause mild discomfort, so... yeah. Summer is nothing to him.

Then last, there's Xenon (and technically Ossa and Nox). Summer is ideal biking weather, so that's usually when you'll see the three of them zooming around cross-country on their motorcycles/Extreme Gear, with Xenon doing more of the show-offy stuff.