Saki, Ichika and Honami's cards and costumes from the Wishful Star Chasers set contain multiple references to their names and current story arcs. Saki's costume is called Hesitant Stella, calling back to her first event, First Star (Stella) After the Rain and its commissioned song, Stella. Multiple golden stars can be seen in the illustration reflecting this. Unlike the other cards in the set, the sky in Saki's card is much brighter and not set at nighttime, possibly linking to her family name, Tenma (天 meaning skies or heavens).
Saki kissing the flowers can be seen as representative of her affection towards Leo/need and the fans that have supported them. From the POV of the viewer, the flowers block Saki's mouth, symbolising her decision to not tell anyone about her true feelings in order to preserve Leo/need's dream and keep them united.
Ichika's costume is called Elegant Sirius. Sirius is the brightest star in the night sky, and stars are a prominent feature in Ichika's card, linking with her surname, Hoshino (星 meaning star). The idea of Ichika being a bright star was also shown in her the WALL another cut, and likely links to her role as Leo/need's frontman during concerts. Whilst the background shows a starry night sky there are also three cyan stars that Ichika is looking at, likely referencing Miku and Ichika's desire to make more Miku songs with Leo/need (as seen in her Connecting With Your Heart Beat event story). Another neat reference to this is that the cyan stars go between the Leo and Virgo symbols on the zodiac chart behind Ichika (Leo being Ichika's star sign and Virgo being Miku's). Another interesting detail with the zodiac chart is the taurus symbol (Saki's star sign) being directly above the tree in the background where Saki is located in her own card.
Adding to that, the fact the tree is so far in the background represents Ichika's ignorance towards Saki's feelings. This is further reinforced by Ichika's eyes being directed towards the Miku-colored stars, showing that she's more focused on her own desires in wanting to create more songs with Miku and connect with fans and the wider community through vocaloid.
Honami's costume is called Calm Polaris. Polaris is more commonly known as the North Star, and is used in navigation, tying nicely to Honami's role as leader and deciding the direction of the group (which was the main conflict in her Unsteady, still steady step event story). This is also represented with the lantern Honami is holding, presenting Honami as a guiding light. This is also the only card in the set where the moon is shown prominently, linking to Honami's surname, Mochizuki (月 meaning moon).
Honami is shown sitting by a tree that resembles the one from Saki's card, but might not be the same given the platform she's sitting on is not visible on the more zoomed out look of the tree in Ichika's card. Honami being closer to the tree, regardless of if it's the same one or not, represents her being closer to Saki's feelings as the leader of Leo/need, whose responsibility it is to consider the feelings of all members. That said, her attention is still directed away from it and instead towards the stars and moon (likely representing Leo/need's fans), symbolising how she is also unaware of Saki's feelings.