Just an FYI Kubo said that when designing senna he was thinking of a female version of Renji, which is why Ichika Renji's daughter looks like her. So it's not just lazy design this is how Kubo envisions Renji's kid tumblrhalix(.)tumblr(.)com/post/149241379743/there-is-a-reason-why-ichika-has-a-resemblance-to As for Rukia not being concerned about where her girl was, it just highlights the two different parenting styles of IH and RR and how IR would probably be incompatible as parents.
ಠ_ಠ what kinda bullshit. you’re quick to tell me about how kubo said that about senna, but conveniently forget fade to black where rukia is shown to take care of two children, being extremely young herself. are you telling me that a person, scratch that, both rukia and renji, who were abandoned at such a young age to fend for themselves, rukia who had recieved no love or affection from the kuchiki household for years and finally found someone who understood and respected her i.e. ichigo would just neglect her own kid? and yes that goes for ichigo as well. leaving the take-care of his own kids to inoue’s fairies and literally not giving a shit thereafter is somehow glorious parenting? Right. steer clear of me with that, thank you very much ಠ_ಠ