Catherine and Christina Guidry are sisters, so they sometimes squabble.
But the Vista del Lago seniors also are twins, so most often they're united.
"We don't always get along, but we're like each other's best friend," said Catherine, who was born first.
"I love Cat," adds Christina. "We have a bond that's a lot different than most siblings."
That special link is softball.
They've been playing together and cheering for each other since they first picked up a bat, glove and ball as raw but athletic youth players in Folsom.
With contrasting strengths, skills and physiques, they're helping turn 5-year-old Vista del Lago into a small-school power that recently won its first league championship and hopes to cap the season by playing for the Sac-Joaquin Section Division IV championship Saturday.
Vista del Lago (18-4) opens the playoffs today against Sierra of Manteca in Stockton.
Vista del Lago coach Robert Reed marvels at how much the Guidrys have improved since they started playing on the Folsom school's first varsity team as freshmen.
"Their development has been impressive," Reed said. "Both have always been fast and athletic, but they've gotten a lot more technical about their games. They've developed more of an appreciation for the strategy."
Catherine, a 5-foot-2 wisp, bats left-handed and is a tough out because of her speed. She leads the Eagles in batting (.507), hits (35) and stolen bases (20) while covering lots of ground in center field.
Christina, sturdier at 5-5, plays third base and has a good batting eye with pop in her bat. She's hitting .426 with 11 RBIs and leads the team in walks (15) and being hit by a pitch (eight).
"People are usually surprised when we say we're twins because we barely look like sisters," Christina said.
While they are able to break down each other's games, it's their ability to build one another's confidence that may be their biggest attribute as a sister-playing duo.
"Cat's really a good teammate," Christina said. "She motivates me; she cheers me up if I'm having a hard day at school. If I make a mistake, she's always there to give my spirit a boost."
Adds Catherine: "My sister is really a funny person and really brightens the moment. But when it comes down to playing, she's really serious."
The twins are two of five Vista del Lago players who have grown together as four-year varsity players.
The Guidrys call pitcher/outfielder Morgan Theis, second baseman/catcher Tayana Mata and first baseman/pitcher Jessica Evans their other sisters.
"It's really cool how our relationship has grown, how we've been able to watch each other improve," Christina said.
"They're our second family," Catherine added. "Since Day One we've been really close. I'm going to miss not playing with them."
The Guidrys figured that they, too, would have to part ways. Most of the recruiting looks they were getting while playing for the California Breeze travel team came from different colleges.
But all that changed during a Sacramento showcase event last summer.
Christina was being scouted among a group of infielders by UC Davis recruiters when someone pointed out her sister also was a softball player and was nearby working out with the outfielders.
Instead of one Guidry, the Aggies will have the twins running the basepaths at UCD next season.
"We couldn't have asked for anything better," Catherine said. "We get to play close to home and get a UC education."
More importantly, their mother, Tracy Berhel, will continue to watch her daughters play side by side.
"We've always looked up to our mother," Christina said. "She was a single mom raising twins. My sister and I are both better persons because she's been in our lives."